Update on the issue (and the solution)
It seems like a possible solution (at least to me) is to probably avoid having a generator tab open with so many comment frames at once, as they’re constantly filling up the whole TCP connection with requests for listening for new comments every time, which is what’s causing the “stalled” problem every time I load and save generators.
See this comment for a reference.
Update 1: Now I’ve just sort of reproduced this by opening the Comments Plugin tab while one of my generators is saving, and then after the tab is being open and then closed, the saving process just stalled out of nowhere.
Recently I was hit by the problem where the saving process just stuck in the background, and when I checked the DevTools Network, there’s a lot of stalled connections when fetching a few resources required for the generator page to fully load. The stall eventually ends for a short time (1-30 min), but sometimes even longer (30-60 minutes), and even after that, it’s either still hangs on “saving” whatsoever, or it rolls back to the perviously “unsaved” state.
I also got the problem with loading generators too, where it hangs very frequently now, for the same reason, except that I sometimes get an ERR_QUIC_PROTOCOL_ERROR
from the console whenever the generator fails to load after the stalled connections.
Is this maybe just because of the internet connection, my browser, or probably the “cache-busting” issue in the end? I tried logging into my other browser (Firefox) and saving the same generator and found no issues. It also loads generators perfectly fine.
The final lookout
So, it turned out the “stalled connection” thing was probably the effect of having so many comment frames open under the “Comments Plugin” tab, each listening for new comments all the time, which is probably why it filled all the TCP connections that I ended up getting stalled connections so often while loading generators. I left that tab pinned for the rest of the browser session and thought that wasn’t the core problem first.
And now, after switching the active pinned tab to the Comments Plugin Example page, which only has one comment frame, I somehow remedied the issue and haven’t been easily getting the connection problem again. But again, thank you for describing all of them!