I would suggest filing a bug report (“New Issue”) on GitHub.
As a potential work-around, you could try to disable the browser extension features that are most disruptive to the HTML DOM:
- Settings > Autofill: Disable “Show autofill suggestions on form fields”.
- Settings > Autofill: Disable “Autofill on page load”.
- Settings > Notifications: Disable “Ask to save and use passkeys”.
- Settings > Notifications: Disable “Ask to add login”.
- Settings > Notifications: Disable “Ask to update existing login”.
If disabling these options fix your issue, then you can re-enable the ones you had previously enabled one by one, to see which one is the culprit.