Zac Hall, 9to5Mac:

We learned about the issue from a reader who says he purchased an Apple Watch Series 3 for his wife for Christmas so she can conveniently check her messages at work in the ICU. After regularly experiencing reboots every 60-90 minutes when wearing Apple Watch in the ICU setting, they had the Apple Watch replaced with a new unit but the issue persists.

Similar stories have surfaced online since Apple Watch Series 3 launched last fall with a growing number of issues reported in recent days. In response to an Apple Support thread created in October, well over a dozen responses echo the same issue in the same environment.

The solution to avoiding reboots in the ICU environment seems to be using the Apple Watch in airplane mode, although that stops the Apple Watch from receiving alerts.

Fascinating.