Groups inside Groups Problem

I have a Problem with my Groups (here window contacts)
I have a Group with all Windows and under this I have window groups from groundfloor, first floor and second floor. Sometimes the all windows group shows closed even if the group first floor shows the state open…After a time the all windows group show the right state open (but in this time i didn´t open or closed any window) Can´t I do groups inside groups ?

All windows Group:
image

image

In Group settings I have this:

please try All CLOSED then CLOSED else OPEN instead.

Thanks, I will try … But the other one should also work or why not ?

Well…

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