Stack-In-Card: Drop-in replacement for vertical-stack-in-card

I have a view where I only have 3 stack-in cards.

In my PRD environment (pre-0.107), ‘custom:vertical-stack-in-card’ used to do this:

Now in my TST environment (0.107.5), ‘custom:vertical-stack-in-card’ or ‘custom:stack-in-card’ do this, for the same exact config:

It seems to be vertically stacking the 3 different ‘custom:vertical-stack-in-card’/‘custom:stack-in-card’ cards. This doesn’t seem to happen in views with other entity cards, only in these (I have 2 in the same situation).

Is it something I’m missing (again), or is this something can someone else can also confirm to happen?

Thanks again.