There was a bug with the app where if the page was loaded and the user scrolled up, causing the app to auto-load earlier activities, if any of those earlier activities were created by users that are now deleted, it'd fail to load those activities into the page. The loading indicator would just stay at the top of the page indefinitely and nothing more could be scrolled/loaded.
Annoying as crap, this bit me a few times. Good to see someone figured it out. Pulling this in now as it fixes a bug that prevents user from using the chat effectively.
There was a bug with the app where if the page was loaded and the user scrolled up, causing the app to auto-load earlier activities, if any of those earlier activities were created by users that are now deleted, it'd fail to load those activities into the page. The loading indicator would just stay at the top of the page indefinitely and nothing more could be scrolled/loaded.