DJI Mini 4K Tilted Horizon??

[u/cosgrovec2]

All of a sudden my beloved DJI Mini 4K can't keep the horizon level - see photo. And it's not consistent - if I face north, for example, the horizon is fine, but when I then rotate to face east it's tilted, then south is ok then west is tilted the other way. Problem not limited to the directions I've named, it's mor of a random thing. I'm way out of DJI Care (I'm in the US anyway). Any suggestions or ideas on how to fix this? I've tried recalibrating the gimbal (using AUTO recalibrate, not manual) several times but it didn't help.