Modern Calendar Add new item page error: "Page creation has failed"

Thanks Paul for your reply but yes we are still having this issue. We do have some users setup as First Release including myself and I am seeing that issue too. I actually reproduced this issue again and noticed that when I create a calendar entry using the modern calendar interface, it actually creates a new .aspx page in the Pages library for every calendar entry I create. This is causing the error obviously because users have only Read permission for the Pages library and the page cannot be created. See attachment please. As mentioned earlier they are able to create the entry after the hit the close button on the error message.

My question is why on earth would it create a page just to create a calendar entry?

I guess I will lodge a ticket with Microsoft as you suggested.