I create a new stack, add two new cards, now there are three cards in the stack.
Open the Project browser and double click on card 2 of the stack.
The dimensions of the stack changes.
Double click on card 3, they change again.
Double click on card 1 they change back to the original stack size.
There are no script in the stack and I have added nothing to it or any of the cards.
What's going on?

I am on a Silicon Mac, Sonoma, LC9.6.11rc1
BTW in the properties for the stack "resizable" is Unchecked.
could not attach a video but here are three snapshots