IMU reads 0 on startup

Today both tractors we are planting with read 0 in the upper left corner of the screen for IMU when we turned them on. This led to some wavy AB lines until we figured it out and restarted the board. Restarting the program and agiio did nothing. The whole time the IMU icon in agio was green. Any thoughts?

Modify the arduino code, i had the same problem.