Interactive Video

We have a problem with Interactive Video contents embedded in IFrames on our platform. The IFrame's scrollbar keeps appearing/dissappearing quickly, so that the embedded video seems to flicker. We observe this in Chrome on different plaforms. I realize that the problem is not necessarily in the H5P elements, but I'm posting my question in this sub-forum anyway, since only the Interactive Video content type seems to be affected.

When editing course content using H5P, page loading is extremely slow and page fails.

H5P Framework v1.24

Interactive Video (1.22.2) on Moodle (v. 3.10.1)

Desktop

Chrome and Edge

Browser console errors message:

Uncaught TypeError: Cannot read property 'start' of undefined

    at InteractiveVideoEditor.H5P

We use H5P to deliver courseware to a lot of users across multiple states in the US in public schools. Many use iPads, and we use the Interactive Video content type exclusively. We host our videos on Azure with CORS rules to stop users from viewing the videos with a direct link to the object on the CDN, by checking for our URL in the "Referer" header. However, it seems in Safari and iOS Chrome, these headers are not sent with the video IF the video is the source in an interactive video H5P element. So, all iOS users are blocked.