A description of what happened:  - My tbs unify pro32 1.1 was in pit mode. But ardupilot did not recognize that it was in pit mode (i.e. the first options bit was 0)  - vtx_get_power_mw() kept returning either 1 or 25. When I set power to 500 then it returned either 1 or 500.  - It's possible that I powered on my flight controller a few seconds before powering my vtx