When a mobile page has a vertical slider, if I click on a button which triggers the popup, then I have incorrect overlay displayed on Safari.  If I override manually the computed value to 0px, it seems to work better: 
When a mobile page has a vertical slider, if I click on a button which triggers the popup, then I have incorrect overlay displayed on Safari.
If I override manually the computed value to 0px, it seems to work better:
