Thanks again @Rodrigo.
It fixed scroll jumping on mobile screen. It was obviously bug with previous version of scroll Trigger.
As for the second question I recorded video just to show an behavior of disappeared content.
https://tempclip.com/q3uhKDnNJW7Jtyx/watch
I figure out if I open for instance first modal and closed it, and after that open second one translate properties has in start point some random value (translate(0, 2000px) for example), but if I keeping scrolling start point back to value of 0. If I turn off scroll Normalize it works well but content jittering.
You can't see this behavior on no iframes version because there are missing meta tag for responsive design I think.
Thanks a lot.
Best,
Dragan