Health app stopped tracking steps

My health app randomly stopped tracking steps. The screen appears to be frozen as of 3:25pm this afternoon. No new activity is being recorded. I did not make any changes to settings during this time.

You can see here that even though it is 7:51, the last time stamp on steps is 3:25. I have definitely been walking since then!

I have tried force closing the app, toggling the motion fitness tracking option on and off, and restarting my phone.

Any other ideas?