Crash Dump Data Detected on Ground

I am using a Cube Blue running Plane 4.6.0 with a SanDisk 32GB SD card installed on a hybrid VTOL aircraft (quadplane) and after seeing some very odd compass behavior on the ground, we did a reboot and suddenly it was reporting that crash dump data was detected. Attached is the crash dump file, any idea why this may have occured? We have seen this before on another quadplane running Plane 4.5.7 on a Cube Orange where crash dump data was generated on the ground, but never got a root cause on that one.

crash_dump.bin (101.0 KB)