This sounds like an aircraft specific issue. Map Pilot catches and displays issues that are thrown by the DJI Diagnostic system. Have you done a full compass and IMU calibration at your site before this happens?
Compass error P4Pv2 on every battery swap
Every time I swap the battery to continue a mission, a compass error is received during startup with the next battery. Turning the drone off and back on again always fixes the issue. Hopefully this is something you can resolve in the next software update.
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Thanks. I thought that also, before creating this post. I immediately opened the DJI Go 4 app after the error was received on the MP app. The DJI app showed no issues at all and was ready to fly.