I recently started using the Gutenberg plugin for its
group block, that is not (yet?) available from Wordpress' native Gutenberg editor.
I also often use Flickity carousel. Lately, it started to show very weird behaviour: certain carousel cells disappear, others scale down a lot, most of them overlap where they shouldn't, navigation scrolls to wrong positions, ...
I found out disabling the Gutenberg plugin fixed all issues in Flickity.
I'm not sure if this can be fixed, so I'm just going to pick one of them from now on. Hope this saves someone a few hours and a headache.