Bugs in content types

I am getting an error message (occasionally, not sure what triggers it) that says "The from value exceeds the maximum of zero" when I try to add a link or textbox in an interactive video. I can't understand it. There are no other interactions to interfere with what I'm adding... I am mystified..

Hi,

In the attached H5P quiz, questions 1-3 grade correctly: one mark is given for each of two missing numbers, to give a total of 2 per question.
The correct responses (in order) are 2:1, 3:1 and 5:3

The problems are with the last two questions:

Hello !

I started to work on the Moodle 3.5 H5P plugin version, and it seems there's a problem with pictures opacity. I tried to change the value of opacity, but it doesn't make a change ! The picture stays the same, backoffice or frontoffice.

Have I done something wrong ? Or maybe I didn't understood this functionnality : is it made to show the picture more transparent or not ?

Best regards,
Olivier VALENTIN