After some period of time (yesterday it took all day, today it froze within 20 minutes of launch), I'm seeing a complete stop in UI updates. The app is still responsive, I can select between tabs, and if I switch between them I see more lines of chat, and anything I typed in the text field before I switched away from the tab (ie: I get a 1-time update), but the cursor doesn't blink, chat doesn't scroll, and typing provides no visual feedback until I switch away from a tab and back to it.
I'm using the bland style, if that helps. I did have a variant that I created based on the faq suggestion to block channel enter & part messaged. I've just set myself back on default bland, and will report back if it doesn't happen again.