Multiple ion-infinite-scroll

I have a page with two lists and I want then to scroll independently, and get their content augmented when the user reaches the end of each list. Here is the codepen:
Unfortunately, it seems that both ion-infinite-scroll are triggered when the list on the right is scrolled-up, not the one on the left. Scrolling the left list has no result.
Looks like a bug to me. Any advise on how to get this working properly?

BTW, looks like I’m not the only one facing the issue:

The issue comes from the ‘require’ ?^ionicScroll that is not resolved properly. Not sure why, as a ionRefresher resolves properly in the same context.
I found a workaround which is about inserting an extra div around the content tags, as in But that looks like a bug.