Why needs the first reference much more time to close than all others?

Hi all,
I am facing a strange problem with closing an array of references.
A few words to my environment:
I can load dynamically VIs into a subpanel sitting on my main VI but if I unload and reload Visa I need to close my Visa properly, not just by stopping.
Therefore I wrote a closingVI which is attached. In this VI I look for a "Stop" button and send a true by signaling.
The problem now is that the very first reference in the "Control[]" needs around 40seconds to close, all following refs just need <1ms! By the way, the array size is just about 24 and it is independent which ref comes first.
In addition to that the problem just occurs when the VI runs longer than 10 minutes, which doesn't makes any sense to me.
Do you have any suggestions?
Stay Hungry, Stay Foolish
Attachments:
Capture.PNG ‏15 KB

Benjamin_ wrote:
The problem now is that the very first reference in the "Control[]" needs around 40seconds to close, all following refs just need <1ms!
I don't know what you are referring to here. You are closing all of the Control references in a single node. Are you saying it takes that long for the Close Reference for the entire array?
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