^^^
Basically, lets say a studio that I'm in had new activity at 11am EDT. I don't get a notification in my messages until 8pm EDT every night. I've asked other people and it happens to them too (MClovers), at the same time in different time zones.

My browser / operating system: MacOS Macintosh X 10.11.6, Chrome 75.0.3770.80, No Flash version detected

Yes, I can confirm I got them around 8:30pm EST. Received a few notifications from the studios I curate. My browser / operating system: MacOS Macintosh X 10.13.6, Chrome 75.0.3770.142

My browser / operating system: Windows NT 10.0, Firefox 68.0, No Flash version detected

Yep, I think it happens to everyone…