Compass suddenly keeps giving an alarm

I am using dual RTK to determine the heading angle without activating the magnetic compass, but suddenly an alarm appeared and the yaw angle was also incorrect. I can only restart the power to solve this problem. What are the reasons that triggered this alarm?

It might be one of the hundreds of fixes in 4.5.1 release.

Realy?I’ll go research 4.5.1 release

Do research all releases between 4.3.x (whatever you have) and 4.5.1