Moodle H5P - Unable to add more than one H5P activity for a resource

Detailed steps to reproduce the bug (exactly how and when did it happen)

1. Go to a Moodle course that you have admin permissions to
2. Open the Content bank for that course
3. Click Upload
4. Drag and drop the scs-test-1.h5p file
5. Click Save changes
6. Click Close
7. Repeat steps 3-6 with the scs-test-2.h5p file
8. Navigate to the same Moodle course from step 1
9. Under any topic, click Add an activity or resource
10. Click Page
11. For the "Name" call it "Test H5P"
12. For "Page content", in the Atto text editor toolbar, click on the H5P button
13. Click Browse repositories...
14. Click Content bank
15. Click on the scs-test-1.h5p file from the content bank
16. Select the Create an alias/shortcut to the file radio button
17. Click Select this file
18. Click Insert H5P
19. Notice that an H5P element was added to the Atto text editor
20. Click onto the next line after the H5P element
21. In the "Page content", in the Atto text editor toolbar, click on the H5P button
22. Click Browse repositories...
23. Click Content bank
24. Click on the scs-test-2.h5p file from the content bank
25. Select the Create an alias/shortcut to the file radio button
26. Click Select this file
27. Click Insert H5P
28. Notice that now two H5P elements are in the Atto text editor
29. Click Save and return to course
30. Click on the page resource that we just created
31. Notice that only one H5P element is rendered/visible, while the other one is the plain text to the H5P link (see Figure 1 in the screenshots section)

Platform and version number: Moodle 3.9.5+ (Build 20210312)

Computer Type: Desktop

Browser: Chrome and Edge

H5P plugin version: H5P - mod_h5pactivity - version: 2020061500

H5P content type and version, and a sample URL or attached H5P: Single Choice Set - version: 1.11.19

Any browser console errors: None, see screenshot:

Any PHP errors: None

Screenshots if it's a visual problem:

Figure 1

Any recent changes to the environment (new plugins/modules, updates, configuration changes etc.): None

Any recent changes to the browser you're using (new extensions, updates etc.): None

Related problem I found on the forms: https://h5p.org/node/18860