On my V2 camera with 22.214.171.124 firmware, the recorded video on the SD card had sync issues. It was playing the audio before the event showed up in the video (clapping hand, you would hear the clap, then see the clap).
So it may be related to motion, but I would expect this functionality to be a “core feature” of the video processing SOC, and not be affected by other CPU processing. I.e. I would expect the firmware to “set up” a recording feature in the SOC, and then that the SOC would handle the “one minute” recording (possibly to a RAM buffer) and then fire an interrupt when the task was complete, but perhaps it does not handle that high of level operation as a built in feature.
The SOC ftp://ftp.ingenic.com/SOC/T20/T20_PB.PDF used in the v2 cameras has “hardware” Image Signal Processing (ISP) and Video Processing Unit, so it should be possible to get a video with properly synchronized audio. But if the firmware is programmed in a “super loop” (like Arduino), handling multiple realtime tasks properly is very complex. It really needs to be done with event processing and state machine, but I don’t know what the SDK they use provides.
I did send two clips to email@example.com (LikeWyze) and they were looking at it. Since it should be easy to reproduce, hopefully they will be able to determine the cause and get a fix.