Bugs in content types

Wordpress version 5.3.2
H5P plugin Version 1.15.0

I have an interactive video. I would like to link to another content I created.

The URL I want to link to is 

https://mywebsite.com/wp-admin/admin-ajax.php?action=h5p_embed&id=3

However when resolving the URL H5P ist changing the & character to &

Hello,

Three bugs I've stumped upon in Essay activity :

1. In "Help text" hint, apostrophes and quotations marks can't be used : their html translations appear "&..." instead of these special characters ;
2. In solution, line breaks don't work ;
3. In keywords fields (used to assess the students' work with words and expressions), apostrophes and quotations marks prevent the recognition of the keywords using them (likely because apostrophes and quotations marks are used in code for text strings ?).

Keep good working,

Dominique BODIN

I'm currently getting an error when trying to view H5P interactives embedded in Canvas (browser is Chrome), despite having third party cookies enabled in Chrome. Attached are screenshots of the error message and the relevant part of my Chrome settings.

UPDATE