Did you do that on min height or max height?
I’m typically putting min height to 0 and focus on max height settings.
How do you have the RG setup, besides the height settings? Meaning the settings on the appearance tab.
One of the things I have been requesting is for a feature to allow us to dictate on a group element that it should be scroll on overflow so that we can setup a RG with a single cell, set to full list placed inside of a container group set to max height of 100% so that the container group will have a scroll bar added when the RG contents would cause on overflow.
At current the container group max height setting of 100% if you do not check fit height to content stretches too much and on preview is all messed up. If you set the max height to 100% and set the fit height to contents it stretches the height to show all results from the RG.
There are many many issues related to the new responsive engine not having all of the necessary features/functions to allow us to really build with it at the moment. It has also been pretty slow in terms of rolling out new features the community has been requesting and I believe Bubble may be holding off on adding much much needed features until they have added all that they plan to.