using interactive videos on telephone

Hi,

I have created interactive videos and then tried to use it on the phone. The only intecaction I use is to pause video at some moments by posting a picture on the video. It happened that when I try to pause video not by the H5P player, but headphone or telefon player (when the browser is minimized or screen is off) I encounter to different problems. 

1. Phone play button does`n start video when it was stopped by interactive element. If I stoped the video my self by clicking on the phone player button or headphone, then I can start it, but if it was stopped by interactive element, then it`s only H5Ps play button what can start video again.
2. I tried several times to check how it works on the phone and sometimes bag #1 doesn`t occur, but then it occurs another. Video stops often regardless of interactive elements. 

There is also problem # 3 experienced:

3. I use "Go to on click" option for that poster that stops the video. When I use PC everything works pefect, I click on the picture and video goes back to the predefined  timecode, but when I do it on the phone, than feature doen¨s work and by clicking on the picture it doesn't go to specific timecode, but trying to fo just forward.

Hope someone knows how to avoid or fix such problems.
Thanks  in advance