When I add more than 3 questions it fails to add them and deletes the entries added after the 3rd.
Question Set 1.13.4
Version: 8.x-1.0-rc4
Drupal.

I can see that there's been great effort into handling the keyboard focus of the questionnaire, but I can also see areas that could be improved:

• Using a <fieldset> to group a radio question & its answers && using a <legend> to wrap the question
• Using an underline to on the active step number to indicate its state as well as its current orange colour && Adding hidden text to explain that "1" is the active step
• Using aria-label for fields that are missing an associated label element, such as the <textarea> field

We're trying to use the questionnaire H5P type to elicit open-ended responses from learners as they work through reading activities. We'd also like to offer them some substantial post-activity feedback, and include the text of a 'model answer' in some cases. The problem we're encountering is that the 'Text to display on submit' field appears to be limited to 255 characters of input, and we'd occasionally like to include more characters in our post-response 'success screen answer'.

Here's an example of what this might look like: https://wisc.pb.unizin.org/rawrtest/wp-admin/admin-ajax.php?action=h5p_embed&id=29. You can see that the response we're trying to give post-completion is truncated because of the character limit. Is this something that we can change locally, or would you be open to a pull request that would expand the size of this field?