Most of the time when I try to set an altitude using the ALT knob as soon as I tilt the right stick to the right, it jumps to 99900 feet. before it used to sometimes drop to -3000ft+ but since the update it jumps to 99900.
If you have the G1000 NXi that is the reason. It doesn’t affect its operation though, only the external HUD and actual hardware displays AFAIK. The unit itself should work fine.