Hi,
I have issues when loading a repeating group which have a group “not visible” & “collapsed when hidden”.
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When the page starts, if you scroll up before scrolling down, the RG will load until cells 11 (see page height extending or HTML)
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If you scroll down to cell index 2, cells until index 15 will load as well
I tried to show the issue here :
=> the issue will appear when you will preview the page + scroll up
=> the issue will appear when you will preview the page + scroll down
It is not an issue for performance on this example, but if the content of the cell is heavy (pictures / conditions / …) it may slow down and freeze for a few seconds (as it loads lot of content that the user doesn’t see yet)
Is it normal ?
Some of you have had this issue too ? (and maybe a solution? 
)
If I am not clear enough, let me know 
By the way, as it is my first post : thank you the community for the ideas/answers/… on the forum it helps a lot when you read them ! 