Emporia Utility Connect Issues

I use the Emporia Utility Connect to track power usage at my home. In addition to tracking energy use coming from the grid, I also have solar power which tracks it being exported.

All was working very nicely with the system until about a week ago, when the Emporia Vue suddenly seems to go offline for hours, and it reports incorrect energy readings (going negative at night / early monring) when obviously the sun isn’t out.

Wondering if anyone else has had issues like this and what you might have done to fix them?