Version 4.0.0 and 4.0.1 break header on single event page

Version 4.0.0 and 4.0.1 have significantly changed the “single event page”:

1. Single event page does not show the header or webpage correctly.
2. There is now a large gap between the featured image and the event date and description.
3. “owner” shows at the top above featured pic, even though we have “Hide Organizers Section” turned ON.
4. Creation date of event shows at the top above featured pic and before the actual event date.

Images comparing versions 3.5.3 and 4.0.0/4.0.1:
https://ibb.co/S7nC8SC
https://ibb.co/Jk5tvsy

Please advise on when these issues will be fixed.

Many thanks -Kim