Image Hotspots are not displayed

Hey!

1. Detailed steps to reproduce the bug (exactly how and when did it happen) -> Image Hotspots are not displayed after the edit has been saved. Neither in very Wordpress view, nor on the homepage. If you want to edit them again, they are still there. It only appears with newly created image hotspots, not with old ones.
2. Platform and version number. E.g. Drupal, Wordpress, Moodle. -> WordPress 5.6
3. Mobile or Desktop -> Desktop, maybe both
4. Browser: Chrome, Firefox, Safari etc -> Firefox, Edge
5. H5P plugin version -> 1.15.0 
6. H5P content type and version (if a content type was used), and a sample URL or attached H5P. -> Latest version, just updated
7. Any browser console errors -> ImageHotspots.Hotspot@https://t...
   ImageHotspots.prototype.attach@https://t...
   H5P.newRunnable@https://t...
   H5P.init/<@https://t...
   each@https://t...
   each@https://t...
   H5P.init@https://t...
   @https://t...
   c@https://t...
   fireWith@https://t...
   ready@https://t...
   H@https://t...
8. Any PHP errors -> nothing changed recently, therefore rather no
9. Screenshots if it's a visual problem
10. Any recent changes to the environment (new plugins/modules, updates, configuration changes etc.) -> nothing, just a new "author" in wordpress
11. Any recent changes to the browser you're using (new extensions, updates etc.) -> no. Moreover, the problem does not only occur with me

Thank you,

Kind regards

Jana