Site Studio 8.1 breaks wysiwyg

Problem/Motivation

I updated this module, gin 4.0.3 -> 4.0.6, and Site Studio 8.0.3 -> 8.1.0 and now the rich text fields in Site Studio using CKEditor 5 are no long working correctly. As I type, the cursor resets back to the beginning preventing users from editing a wysiwyg field. I've seen this behavior on 2 different sites.

This might just be an issue on the Site Studio side so I'll open a ticket with Acquia, but I wanted to report it here in case someone else comes across this and has any workarounds.