Annoying safari bug. Existed through several OS updates
I am running Catalina 10.15.2 but this bug has existed for several OS updates. After a while opening Quora or youtube, either one or both will stall forever with no error messages. The fix is to open safari preferences->privacy->manage website data, wait a few minutes until it loads then delete the entry for quota or youtube, whichever is sticking. Once this is done the website in question works fine until it sticks again. Sometimes I just do the website data delete every morning.
This does not happen with Chrome or Firefox browsers. Calling support gets nowhere because unless it is happening support sees nothing and once I demonstrate the issue it may be a few days before it shows again.
The current version of safari I run is 13.0.4 but this bug has existed through several updates.
iMac 21.5", macOS 10.15