Continuing the discussion from https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-955-series/309272/fr955-bug-report-gps-stops-when-watch-face-hotkey-is-used/1523642 which has been locked for some reason:
This issue seems to be fixed in the latest beta in at least in the walk activity. Unfortunately, I tried it during an indoor bike activity today and all sensors dropped and wouldn’t ever reconnect, so I just lost the second half of the activity.