diff --git a/src/region/blockchain_region_v1.erl b/src/region/blockchain_region_v1.erl
index fbfa2559b9..493e7ce5b4 100644
--- a/src/region/blockchain_region_v1.erl
+++ b/src/region/blockchain_region_v1.erl
@@ -65,25 +65,31 @@ h3_to_region(H3, Ledger) ->
 
 -spec h3_to_region(H3 :: h3:h3_index(),
                    Ledger :: blockchain_ledger_v1:ledger(),
-                   RegionBins :: no_prefetch | [{atom(), binary() | {error, term()}}]) ->
+                   RegionBins :: no_prefetch | {VarNonce :: pos_integer(), [{atom(), binary()} | {error, term()}]} | {error, term()}) ->
     {ok, atom()} | {error, any()}.
 h3_to_region(H3, Ledger, RegionBins) ->
-    {ok, VarsNonce} = blockchain_ledger_v1:vars_nonce(Ledger),
     %% maybe allow this to be passed in?
     Res = polyfill_resolution(Ledger),
     HasAux = blockchain_ledger_v1:has_aux(Ledger),
     Parent = h3:parent(H3, Res),
     Cache = persistent_term:get(?region_cache),
+    {MaybeBins, VarsNonce} =
+    case RegionBins of
+        no_prefetch ->
+            {ok, Nonce} = blockchain_ledger_v1:vars_nonce(Ledger),
+            {get_all_region_bins(Ledger), Nonce};
+        {error, _} = Err ->
+            {Err, 0};
+        {Nonce, B} when is_integer(Nonce), is_list(B) -> {{ok, B}, Nonce}
+    end,
+
+
+    {ok,VarsNonce} = blockchain_ledger_v1:vars_nonce(Ledger),
+
     cream:cache(
         Cache,
         {HasAux, VarsNonce, Parent},
         fun() ->
-                MaybeBins =
-                    case RegionBins of
-                        no_prefetch -> get_all_region_bins(Ledger);
-                        {error, _} = Err -> Err;
-                        B -> {ok, B}
-                    end,
                 case MaybeBins of
                     {ok, Bins} ->
                         h3_to_region_(Parent, Bins);
@@ -109,7 +115,7 @@ h3_in_region(H3, RegionVar, Ledger) ->
     H3 :: h3:h3_index(),
     RegionVar :: atom(),
     Ledger :: blockchain_ledger_v1:ledger(),
-    RegionBins :: [{atom(), binary() | {error, any()}}]
+    RegionBins :: {pos_integer(), [{atom(), binary()} | {error, term()}]} | {error, any()}
 ) -> boolean() | {error, any()}.
 h3_in_region(H3, RegionVar, Ledger, RegionBins) ->
     Res = polyfill_resolution(Ledger),
@@ -138,7 +144,7 @@ region_([{ToCheck, Bin} | Remaining], H3) ->
     end.
 
 -spec h3_to_region_(H3 :: h3:h3_index(),
-                    RegionBins :: [{atom(), binary() | {error, any()}}]) ->
+                    RegionBins :: [{atom(), binary()} | {error, term()}] | {error, any()}) ->
     {ok, atom()} | {error, any()}.
 h3_to_region_(H3, RegionBins) ->
     region_(RegionBins, H3).
@@ -179,13 +185,14 @@ prewarm_cache(Ledger) ->
         {error, regulatory_regions_not_set} ->
             ok;
         {ok, RB} ->
+            {ok, Nonce} = blockchain_ledger_v1:vars_nonce(Ledger),
             blockchain_ledger_v1:cf_fold(
               active_gateways,
               fun({_, BG}, Acc) ->
                       G = blockchain_ledger_gateway_v2:deserialize(BG),
                       case blockchain_ledger_gateway_v2:location(G) of
                           undefined -> Acc;
-                          Loc -> _ = h3_to_region(Loc, Ledger, RB)
+                          Loc -> _ = h3_to_region(Loc, Ledger, {Nonce, RB})
                       end
               end,
               0, Ledger),
diff --git a/src/transactions/v1/blockchain_txn_poc_receipts_v1.erl b/src/transactions/v1/blockchain_txn_poc_receipts_v1.erl
index 59e230b999..d60edb407b 100644
--- a/src/transactions/v1/blockchain_txn_poc_receipts_v1.erl
+++ b/src/transactions/v1/blockchain_txn_poc_receipts_v1.erl
@@ -1414,8 +1414,9 @@ is_same_region(Version, SourceRegion0, DstRegion0) ->
                        Channel :: non_neg_integer(),
                        Ledger :: blockchain_ledger_v1:ledger()) -> tagged_witnesses().
 tagged_witnesses(Element, Channel, Ledger) ->
+    {ok, VarsNonce} = blockchain_ledger_v1:vars_nonce(Ledger),
     {ok, RegionVars} = blockchain_region_v1:get_all_region_bins(Ledger),
-    tagged_witnesses(Element, Channel, RegionVars, Ledger).
+    tagged_witnesses(Element, Channel, {VarsNonce, RegionVars}, Ledger).
 
 tagged_witnesses(Element, Channel, RegionVars0, Ledger) ->
     SrcPubkeyBin = blockchain_poc_path_element_v1:challengee(Element),
@@ -1586,8 +1587,9 @@ calculate_rssi_bounds_from_snr(SNR) ->
 get_channels(Txn, Chain) ->
     Ledger = blockchain:ledger(Chain),
     Version = poc_version(Ledger),
+    {ok, VarsNonce} = blockchain_ledger_v1:vars_nonce(Ledger),
     {ok, RegionVars} = blockchain_region_v1:get_all_region_bins(Ledger),
-    get_channels(Txn, Version, RegionVars, Chain).
+    get_channels(Txn, Version, {VarsNonce, RegionVars}, Chain).
 
 get_channels(Txn, Version, RegionVars, Chain) ->
     Challenger = ?MODULE:challenger(Txn),
diff --git a/src/transactions/v2/blockchain_txn_poc_receipts_v2.erl b/src/transactions/v2/blockchain_txn_poc_receipts_v2.erl
index 6d31b5f4df..19779add0a 100644
--- a/src/transactions/v2/blockchain_txn_poc_receipts_v2.erl
+++ b/src/transactions/v2/blockchain_txn_poc_receipts_v2.erl
@@ -912,8 +912,9 @@ valid_receipt(PreviousElement, Element, Channel, Ledger) ->
                       Channel :: non_neg_integer(),
                       Ledger :: blockchain_ledger_v1:ledger()) -> blockchain_poc_witness_v1:poc_witnesses().
 valid_witnesses(Element, Channel, Ledger) ->
+    {ok, Nonce} = blockchain_ledger_v1:vars_nonce(Ledger),
     {ok, RegionVars} = blockchain_region_v1:get_all_region_bins(Ledger),
-    valid_witnesses(Element, Channel, RegionVars, Ledger).
+    valid_witnesses(Element, Channel, {Nonce, RegionVars}, Ledger).
 
 valid_witnesses(Element, Channel, RegionVars, Ledger) ->
     TaggedWitnesses = tagged_witnesses(Element, Channel, RegionVars, Ledger),
@@ -970,8 +971,9 @@ is_same_region(SourceRegion0, DstLoc, Ledger) ->
                        Channel :: non_neg_integer(),
                        Ledger :: blockchain_ledger_v1:ledger()) -> tagged_witnesses().
 tagged_witnesses(Element, Channel, Ledger) ->
+    {ok, Nonce} = blockchain_ledger_v1:vars_nonce(Ledger),
     {ok, RegionVars} = blockchain_region_v1:get_all_region_bins(Ledger),
-    tagged_witnesses(Element, Channel, RegionVars, Ledger).
+    tagged_witnesses(Element, Channel, {Nonce, RegionVars}, Ledger).
 
 %%-spec tagged_witnesses(Element :: blockchain_poc_path_element_v1:poc_element(),
 %%                       Channel :: non_neg_integer(),
@@ -982,8 +984,7 @@ tagged_witnesses(Element, Channel, RegionVars0, Ledger) ->
     {ok, SourceLoc} = blockchain_ledger_v1:find_gateway_location(SrcPubkeyBin, Ledger),
     RegionVars =
         case RegionVars0 of
-            {ok, RV} -> RV;
-            RV when is_list(RV) -> RV;
+            {N, RV} when is_list(RV), is_integer(N) -> {N, RV};
             {error, _Reason} -> no_prefetch
         end,
     SourceRegion = blockchain_region_v1:h3_to_region(SourceLoc, Ledger, RegionVars),
@@ -1106,11 +1107,12 @@ get_channels(Txn, Chain) ->
     Ledger = blockchain:ledger(Chain),
     Version = poc_version(Ledger),
     {ok, RegionVars} = blockchain_region_v1:get_all_region_bins(Ledger),
-    get_channels(Txn, Version, RegionVars, Chain).
+    {ok, Nonce} = blockchain_ledger_v1:vars_nonce(Ledger),
+    get_channels(Txn, Version, {Nonce, RegionVars}, Chain).
 
 -spec get_channels(Txn :: txn_poc_receipts(),
                    POCVersion :: pos_integer(),
-                   RegionVars :: no_prefetch | [{atom(), binary() | {error, any()}}] | {ok, [{atom(), binary() | {error, any()}}]},
+                   RegionVars :: no_prefetch | {pos_integer(), [{atom(), binary() | {error, any()}}]} | {error, any()},
                    Chain :: blockchain:blockchain()) -> {ok, [non_neg_integer()]} | {error, any()}.
 get_channels(Txn, POCVersion, RegionVars, Chain) ->
     Path0 = ?MODULE:path(Txn),
@@ -1135,13 +1137,13 @@ get_channels(Txn, POCVersion, RegionVars, Chain) ->
                     Ledger :: blockchain_ledger_v1:ledger(),
                     Path :: [libp2p_crypto:pubkey_bin()],
                     LayerData :: [binary()],
-                    RegionVars :: no_prefetch | [{atom(), binary() | {error, any()}}] | {ok, [{atom(), binary() | {error, any()}}]} | {error, any()}) -> [non_neg_integer()].
+                    RegionVars :: no_prefetch | [{atom(), binary() | {error, any()}}] | {error, any()}) -> [non_neg_integer()].
 get_channels(_POCVersion, Ledger, Path, LayerData, RegionVars0) ->
     Challengee = hd(Path),
     RegionVars =
         case RegionVars0 of
-            {ok, RV} -> RV;
-            RV when is_list(RV) -> RV;
+            %{ok, RV} -> RV;
+            {N, RV} when is_list(RV), is_integer(N) -> {N, RV};
             no_prefetch -> no_prefetch;
             {error, Reason} -> error({get_channels_region, Reason})
         end,
diff --git a/src/transactions/v2/blockchain_txn_rewards_v2.erl b/src/transactions/v2/blockchain_txn_rewards_v2.erl
index 4e9947dc12..8c6fb90b55 100644
--- a/src/transactions/v2/blockchain_txn_rewards_v2.erl
+++ b/src/transactions/v2/blockchain_txn_rewards_v2.erl
@@ -294,14 +294,15 @@ calculate_rewards_(Start, End, Ledger, Chain, ReturnMD) ->
 calculate_rewards_metadata(Start, End, Chain) ->
     {ok, Ledger} = blockchain:ledger_at(End, Chain),
     Vars0 = get_reward_vars(Start, End, Ledger),
+    {ok, Nonce} = blockchain_ledger_v1:vars_nonce(Ledger),
     VarMap = case blockchain_hex:var_map(Ledger) of
                  {error, _Reason} -> #{};
                  {ok, VM} -> VM
              end,
 
-    RegionVars = blockchain_region_v1:get_all_region_bins(Ledger),
+    {ok, RegionVars} = blockchain_region_v1:get_all_region_bins(Ledger),
 
-    Vars = Vars0#{ var_map => VarMap, region_vars => RegionVars},
+    Vars = Vars0#{ var_map => VarMap, region_vars => {Nonce, RegionVars}},
 
     %% Previously, if a state_channel closed in the grace blocks before an
     %% epoch ended, then it wouldn't ever get rewarded.