Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -rb4337dc5afaca148dd23c0c4021875563b565739 -r41c5e70eccfc2c11a0352fe94e107fc44d83ca5b
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision b4337dc5afaca148dd23c0c4021875563b565739)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 41c5e70eccfc2c11a0352fe94e107fc44d83ca5b)
@@ -676,6 +676,7 @@
                 stabilizationStartTimeMs = getMSTimerCount();
                 useShortStabilizeTime = USE_NORMAL_STABILIZATION_PERIOD;
                 currPresLimitsState = PRESSURE_LIMITS_STATE_STABILIZATION;
+                // Open air trap valve to clear any accumulated bubbles
                 signalAirTrapValveOpen();
             }
             break;