I had this issue occur to me once or twice and I identified that it was a "disconnect" between controlling the AC via the panel and via the App. IIRC, I turned it on via the app from my house to precool here in AZ, went in later to do some school work, then shut it off at the panel. The panel was greyed out, like it should be and I left the RV.
As a general rule the AC in the best of situations will continue to run for a few minutes until the system is no longer cold, so even though the unit was still "running" it didnt raise an alarm. Some time later I went outside and realized it was still running and went back to the RV to investigate. As a result of poking around, I realized that once I turned the AC off, just as I turned it on, via the App.....it shut down properly.
2021 (Dec) Dynamax Isata 30 FW Xplorer