Hi, I have updated the following site chattyamo.it to Joomla 5. The site is the copy, made for update purpouses, of the original site birbachilegge.it. After updating to the CMS version above we find a lot of problems related to the page builder. As an example you can see the page https://www.chattyamo.it/festa-delle-storie-2025, copy of the original page https://www.birbachilegge.it/festa-delle-storie-2025: the highest part of the page of the page has disappeared. Also on the backend of the page we finded some problems, look at the screenshot below:

We have verified multiple times and until now the only browser in which the media popup on the backend works fine is chromium.
Can you please check and help correct the bug?
Thanks in advance, best regards.