My brand-new 955 Solar Forerunner frequently pauses randomly and even reboots during a run

I bought a new Garmin 955 Solar about 3 months ago. After turning off the various notifications that are not useful for basic running I am now regularly getting behavior where the watch pauses in the middle of recording a run and asks me to Save or Resume. The battery is fully charged so it's not that.

Today for example on a 4 mile run it did it twice. What happens during that time - does it estimate the activity until Resume is selected? Then in the same session it actually powered down and rebooted and then went into resume/save prompt.

The previous thread was closed from 2 years ago reporting similar things. But I have this problem fresh out of the box