Drag and Drop

I have a strange error, with H5P, and after much, much, much research, I stil don't have an answer...
we're using Moodle 3.5 as a platform, but... upgrading to 3.6/3.7/3.8 did NOT solve the issue unfortunately.

Reaching out to the community for the much appreciated help!

what's the issue(s):

1: interactive video not (allways) playing:

Hello H5P community,

I need to hire a developer to customize the content type Drag & Drop. I need it to be able to test quantity instead of a right or wrong answer. 

Ideally, a dropzone would be given a number of draggables to be dropped in. If the number of draggables is met the dropzone will return correct.

The draggables will be all equal, however, we will not be using the "Infinite number of element instances", instead, we will be adding as many draggables as required to fill the dropzones. 

The drag and drop feature is amazing! Could you add an "immediate feedback" button to it? I is a behavioral option which I saw in the fill in the blank feature which says, "Automatically Check Answers After Input."

I am teaching my students how to solve equations with it (which is great!). I would like them to be able to drag a number or variable into the spot I have on the worksheet and immediately know whether they got that step of solving the equation correct or incorrect, before moving to the next step.