Upgraded an hour ago (coming from #1084), no workarounds needed anymore.
But: I had to reinstall all PaperUI configured (I am not usind the addons.cfg) bindings, actions, …
Works flawlessly, no endless spinning wheels anymore, no need to reload the page. Just a simple “binding installed”. Nice work, thanks.
It took a little while until everything settled and I too had to delete cache and tmp in between, but that was it.
Also big kudos to @sjka, thx for all your hard work.