Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r134d96d197007eeafb2e8e41de941742f348f9db -r517905db003e860a4c4a21e9d0ac84e38be2d9ad
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 134d96d197007eeafb2e8e41de941742f348f9db)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 517905db003e860a4c4a21e9d0ac84e38be2d9ad)
@@ -677,6 +677,8 @@
                 stabilizationStartTimeMs = getMSTimerCount();
                 useShortStabilizeTime = USE_NORMAL_STABILIZATION_PERIOD;
                 currPresLimitsState = PRESSURE_LIMITS_STATE_STABILIZATION;
+                // Fill air trap to clear any accumulated bubbles
+                signalAirTrapPeriodicFill();
             }
             break;