Apart from timeout 524? error, I haven't had many issues, except the read or not read part.
It says cloud is ok in diagnostics with 524? error, but error occurs at host server.
Most likely there is no server to take connections only and another server that does the database stuff to reduce load on the host server.
Sometimes find with new web software, that need to update to latest versions of browser software with latest updates with flash for glitches to go away.
Try updating flash, browser if you can to see if it fixes the issues.