Just wanted to update here - the fix was actually on the playground’s side (not the playground website, the actual playground). noPreventDefault should be set to true when attaching control, otherwise it will act wrong. As we don’t have direct access to the information from the iframe, it is not possible to do that programmatically from the doc page. There is a very complex way to override the behavior on the doc level, but this will probably have perf implications which I would rather not introduce.
TL;dr - The issue was attachControl without noPreventDefault. if you find more playgrounds like that please let me know and I will fix it.
Thanks!