If you have another camera, it would be good to try it in this location, but if you’ve moved the camera around in the garage and get the same results, it starts to look like the camera might be bad. You could also try going to live stream for that camera and watch it live as you move the camera. Another thing I would try is while viewing live stream, tap the crescent moon icon with the Auto, Off & On in the upper right hand corner of the live stream page. That will toggle the filter.
The glare as the problem made a lot of sense until I saw this:
If that doesn’t cause a glare problem, I don’t know what will.