downloader, pathdb/database: do not disable database during snap sync for backward compatibility

eth/downloader/downloader.go

@@ -388,9 +388,11 @@ func (d *Downloader) synchronise(id string, hash common.Hash, td *big.Int, mode
 			// subsequent state reads, explicitly disable the trie database and state
 			// syncer is responsible to address and correct any state missing.
 			if d.blockchain.TrieDB().Scheme() == rawdb.PathScheme {
-				if err := d.blockchain.TrieDB().Disable(); err != nil {
-					return err
-				}
+				// Disabling trie database for snap sync, We will not disable here for backward compatibility with handling consensus logic.
+
+				// if err := d.blockchain.TrieDB().Disable(); err != nil {
+				// 	return err
+				// }
 			}
 			// Snap sync uses the snapshot namespace to store potentially flakey data until
 			// sync completely heals and finishes. Pause snapshot maintenance in the mean

trie/triedb/pathdb/database.go

@@ -179,9 +179,11 @@ func New(diskdb ethdb.Database, config *Config) *Database {
 	}
 	// Disable database in case node is still in the initial state sync stage.
 	if rawdb.ReadSnapSyncStatusFlag(diskdb) == rawdb.StateSyncRunning && !db.readOnly {
-		if err := db.Disable(); err != nil {
-			log.Crit("Failed to disable database", "err", err) // impossible to happen
-		}
+		// Disabling trie database for snap sync, We will not disable here for backward compatibility with handling consensus logic.
+
+		// if err := db.Disable(); err != nil {
+		// 	log.Crit("Failed to disable database", "err", err) // impossible to happen
+		// }
 	}
 	log.Warn("Path-based state scheme is an experimental feature")
 	return db