I don't use Chrome, but I understand that all browsers should have a function that allows you to inspect pages, there you can inspect the text box and it should have the list of events somewhere.
Viewing post in Cannot paste in review
Yep. Disabling this makes pasting possible. Something in that chain of events does fire a cought exception when pasting. The exception does not fire, when the event is disabled. It does not update the optional text on paste, only after some key press events.
Failed to execute 'querySelectorAll' on 'Document': '.modal-body:visible' is not a valid selector. at Function.se [as find] (https://static.itch.io/lib.min.js?1730772173:2:7028) ...
So something to do with formatting I guess. There will be a zero width space be pasted, if you paste. So it does paste something, but that something was reduced to a space you cannot see.