Hi @ShengdiZhang ,
Thank you for your response. I'll add some additional details below:
#1- We are using ArcGIS Online's Experience Builder. To clarify- auto height does shrink to size (but still has issue in #2), custom size does not shrink to filtered area.
#2- In live view we see the double scroll bar when set to auto:
and out of edit mode we also see this double scroll behavior:
The container for this list is much larger than the list as well therefore there should be no reason for a double scroll:
Thank you,
Amanda