diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1ffd4dd..56287ea0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@
  - fix `pio workers update-active` using the wrong HTTP verb.
  - When the local access point would start on a fresh boot, the SSID would start as `pioreactor`, and then change to `pioreactor-<leader-name>` after the next reboot. Now, this will now always be `pioreactor-<leader-name>`.
  - Fix using ethernet cable to connect Pioreactor to a router: a new simple ethernet nmconnection has been added, and has higher connection priority than the PioreactorLocalLink nmconnection.
+ - Fix race conditions between stirring and growth-rate.
 
 ### 24.5.13
 
diff --git a/pioreactor/actions/self_test.py b/pioreactor/actions/self_test.py
index f22c6ccb..df237227 100644
--- a/pioreactor/actions/self_test.py
+++ b/pioreactor/actions/self_test.py
@@ -136,7 +136,7 @@ def test_all_positive_correlations_between_pds_and_leds(
     adc_reader = ADCReader(
         channels=ALL_PD_CHANNELS, dynamic_gain=False, fake_data=is_testing_env(), penalizer=0.0
     )
-    adc_reader.setup_adc()
+    adc_reader.tune_adc()
 
     ir_led_channel = cast(LedChannel, config["leds_reverse"][IR_keyword])
 
@@ -240,7 +240,7 @@ def test_ambient_light_interference(client: Client, logger: CustomLogger, unit:
         fake_data=is_testing_env(),
     )
 
-    adc_reader.setup_adc()
+    adc_reader.tune_adc()
     led_intensity(
         {channel: 0 for channel in ALL_LED_CHANNELS},
         unit=unit,
@@ -273,7 +273,7 @@ def test_REF_is_lower_than_0_dot_256_volts(
     adc_reader = ADCReader(
         channels=[reference_channel], dynamic_gain=False, fake_data=is_testing_env(), penalizer=0.0
     )
-    adc_reader.setup_adc()
+    adc_reader.tune_adc()
 
     with change_leds_intensities_temporarily(
         {ir_channel: ir_intensity},
diff --git a/pioreactor/background_jobs/growth_rate_calculating.py b/pioreactor/background_jobs/growth_rate_calculating.py
index 3757295b..262dd2bc 100644
--- a/pioreactor/background_jobs/growth_rate_calculating.py
+++ b/pioreactor/background_jobs/growth_rate_calculating.py
@@ -40,6 +40,7 @@
 from datetime import datetime
 from json import dumps
 from json import loads
+from time import sleep
 from typing import Generator
 
 import click
@@ -243,6 +244,8 @@ def create_obs_noise_covariance(self, obs_std):  # type: ignore
     def _compute_and_cache_od_statistics(
         self,
     ) -> tuple[dict[pt.PdChannel, float], dict[pt.PdChannel, float]]:
+        # why sleep? Users sometimes spam jobs, and if stirring and gr start closely there can be a race to secure HALL_SENSOR. This gives stirring priority.
+        sleep(5)
         means, variances = od_statistics(
             self._yield_od_readings_from_mqtt(),
             action_name="od_normalization",
diff --git a/pioreactor/background_jobs/od_reading.py b/pioreactor/background_jobs/od_reading.py
index 42862ab9..cd67a43b 100644
--- a/pioreactor/background_jobs/od_reading.py
+++ b/pioreactor/background_jobs/od_reading.py
@@ -145,7 +145,7 @@ class ADCReader(LoggerMixin):
     from pioreactor.background_jobs.od_reading import ADCReader
 
     adc = ADCReader(["1", "2"], fake_data=False)
-    adc.setup_adc()
+    adc.tune_adc()
 
     while True:
         print(adc.take_reading())
@@ -179,7 +179,7 @@ def __init__(
         else:
             self.most_appropriate_AC_hz = None
 
-    def setup_adc(self) -> PdChannelToVoltage:
+    def tune_adc(self) -> PdChannelToVoltage:
         """
         This configures the ADC for reading, performs an initial read, and sets variables based on that reading.
 
@@ -425,7 +425,7 @@ def take_reading(self) -> PdChannelToVoltage:
 
         """
         if not self._setup_complete:
-            raise ValueError("Must call setup_adc() first.")
+            raise ValueError("Must call tune_adc() first.")
 
         max_signal = -1.0
         oversampling_count = self.oversampling_count
@@ -906,7 +906,7 @@ def __init__(
                 self.start_ir_led()
                 sleep(0.10)
 
-                on_reading = self.adc_reader.setup_adc()  # determine best gain, max-signal, etc.
+                on_reading = self.adc_reader.tune_adc()  # determine best gain, max-signal, etc.
 
                 # IR led is off so we can set blanks
                 self.stop_ir_led()