Yes, there are plenty of threads about this. It probably started in beta 5.57. It affects a number of different power meters.
A fix to this issue has been rolled out with 6.51 beta https://forums.garmin.com/forum/on-the-trail/wrist-worn/fenix-5-5s-plus/1435261-fenix-5-5s-plus-6-51-beta-release