Apple Watch workout GPS keeps dropping out

A couple weeks ago (after 2 years of flawless operation), my workouts (run, bike) recorded on my AW Series 4 WiFi+cellular started to record data incorrectly. Specifically, the gps data keeps dropping out for 5-15 seconds repeatedly throughout my workouts. This causes the app to only record about 75% of the correct distance covered, and my gps maps look a string of sausage links (pics attached). When I use Strava on my AW it does the same thing, but when I record my workouts with the Strava app on my phone they record correctly (I always carry my phone with me).

I can’t think of any settings that would have changed recently in my phone or AW, and I’ve tried disabling and enabling tracking services, but to no avail.

I haven’t been able to find anyone else on the internet that’s having the same problem. Any idea what’s going on here?