Safari problems since Sonoma upgrade
Safari is unusable after waking since the Sonoma upgrade. As soon as I click on the browser the Beachball appears, mostly not spinning. This persists for a while then the normal Cursor appears. So I click again and the beachball appears again. Sometimes it settles down and sometimes I have to right click the Dock icon, which reads "Application not responding" and I have to Force Quit.
Context as follows: 2 tabs on YouTube open when the machine's lid is closed. It's returning these YouTube tabs to their proper state that seems to cause the issues. This has not happened on any previous version of macOS.
MBPro M1
Safari has 1Blocker and Adblock installed - this also hasn't been a problem before.