I had lot of flights with my hexacopter that uses Pixhawk. I never had any major problems.
Lately I noticed that batteries voltage drops very noticeably in flight (from 24V to 16V) and then quickly recovers back to normal. Tried 3 different batteries, same problem. It doesn’t matter if I give a throttle, it happens in hover without reason.
Last flight my multirotor started to land automatically but I quickly switched to stabilize mode and landed safely.
Here is what my log looks like:
Any idea what is wrong?