The only (very small) issue I have come acorss is in the GNOME Edition, sushi has stopped working in Nautilus.
The error is:
JS ERROR: SyntaxError: expected property name, got '{' @ resource:///org/gnome/NautilusPreviewer/js/viewers/html.js:63
After some investigation it turns out that it is a bug reported upstream. The solution is to update gjs to 1.71.1. The current version in the repos is 1.70.2-1. Since this isn’t a do or die issue, I can wait for that package to be updated.
Double super still brings up all apps for me. Though it does need to be pressed quite quickly.