Formsnap 4 issue when hiding stacks in edit mode

@yabdab I am creating a long form in Formsnap 4. Because it is long I am hiding the stacks in edit mode but, if I hide more than about 10 stacks, individual stacks start to disappear - maybe 4 or 5 at a time. They are still there in Preview, but in edit mode they are nowhere to be seen. Neither can you get the missing stacks back by ‘unhiding’ the others. Restarting usually makes some stack visible again but not all of them unless I unhide them before restarting.

I should add these are ALL stacks placed within the FormSnap ‘parent’ stack.

Not had a chance to test extensively but it may be related to the Radio Input stacks. I have created a large dummy form with no radio inputs and cannot replicate the issue. When the radio Input stacks are hidden they have no space margin below so become very bunched-up and appear to get slightly narrower.

Any ideas?

Just to add, If I select the radio inputs to be horizontal on one stack, all the other radio input stacks disappear. Further, they don’t like being inside a grid. Each instance in a grid makes the grid stack smaller until you cant put anything in them.