11-07-2019 01:06 PM
Thanks for sharing a sample file.
As this is not a usual behavior, please try running a manual update. https://gopro.com/en/us/update/hero8-black
Once done, reset the camera to its factory settings. https://community.gopro.com/t5/en/Reset-Camera-Settings/ta-p/388279
Please make sure to back up any important files.
Let us know how it goes.