I have a pop up with 3 tabs within it. When I click 2 of the tabs it shows a group with a repeating group within it. The popup stays the right size. When I click the 3rd tab, it shows a group with a group within it (not repeating group) and this group expands the bottom of the pop up downward. When I delete the group within the group this behavior goes away so I know its the group causing this issue. Is there a way to prevent the group from doing this to the popup?
Narrowed it down to an icon element throwing things off.
Those pesky rogue elements always throw things off. Good catch! 
thanks!! I thought it worked but it didnt LOLOL will keep trying!
Hmm 
Are your groups overlapping each other or stacking on top like legos? See example: Understanding Vertical Scrolling Elements in Bubble - #8 by J805
Make sure your groups stack down the popup so the popup is longer than it should be, just make sure collapse height when hidden is checked. 