I imported my Experience made with ArcGISExperienceBuilder 1.1 (Developer Edition) into ArcGISExperienceBuilder 1.2.
I have a widget "Column" including widgets "Text" (1) "Image" (2) and "Feature Info" (2).
The "Scrollable" parameter is activated (see image).
My problem is that the elements of the column remain fixed, whereas with version 1.1 there is no problem and the column is scrollable (see video).
Is it a configuration problem or a bug?
Can you share your config.json with me please in a private message? I wasn't able to reproduce your issue.
I just sent you my config.json file as a private message.