Hi @earagon @nazarenob4
Try running a manual update and make sure you are using a recommended SD card.
Other users also suggest to charge your camera fully, then remove and reinsert the battery.
Let us know how it goes.
There is a recently released update for the HERO7 Black.
If you check on your camera settings, what version is it currently on?
The recent update should take care of the issue listed.
Please have your camera updated to version 1.80
It will be best to update the camera manually.