Timeline not displaying on Firefox

  1. Detailed steps to reproduce the bug (exactly how and when did it happen)
    Added the H5P timeline activity to Moodle and added content. Works great on Safari but isn't working on Firefox
  2. Platform and version number. Moodle 4.2
  3. Mobile or Desktop  Desktop
  4. Browser: Chrome, Firefox, Safari etc  Firefox
  5. H5P plugin version: 1.16
  6. H5P content type and version (if a content type was used), and a sample URL or attached H5P. H5P-timeline
  7. Any browser console errors No
  8. Any PHP errors No
  9. Screenshots if it's a visual problem Empty white area
  10. Any recent changes to the environment: 1.24
  11. Any recent changes to the browser you're using (new extensions, updates etc.) No


Content types: