Hi there, @philip.r.deng… I don’t know if this idea will work for you, but I was trying a couple of weeks ago to do something similar to what you have described when this post hit the forum…
The video does a great job (shout out to @Thiago!) of showing how to use the Toolbox plugin and one line of Javascript to scroll to a dynamic position on a page. I was able to use the info to return to a user’s scrolling position within multiple repeating groups (albeit, repeating groups with different data in them), and I am wondering if you might be able to do the same thing.
Bubble enables you to store the Current page scrolling position, so maybe you can store that value on the user as they move from group to group and then use the value to scroll to the same position in the most recently-opened group. Like I said, I’m not sure if this idea will work for you, and the groups being different widths could make it a non-starter. That being said, it worked like a charm for me, so I didn’t think it could hurt to throw it out there, even if it just ends up being food for thought.
Best…
Mike