I've been using briar for a bit as my primary RSS feed reader. It's worked very well, until a few weeks ago (can't pinpoint exactly when) when the blog stopped updating itself in the background or otherwise didn't notify me of new entries like it did. I've checked my notification settings, and it is supposed to notify, and I've had the battery settings set to "Not Optimized" since installation.

What can I do to help diagnose this issue?