Do you actually have that many machines and add-ons to actually cover each of those flows? PAD does not support concurrent flows on a single machine and a single add-on only covers one concurrent flow run. So, in order to actually have all of them running, you would need to have that many machines and add-ons.
Seems like it got hung on something. Try cancelling the parent cloud flows to clear this and then see if it keeps happening with new flows.
Also, what does the desktop flow actually do? Can it be that it has gotten into some kind of an infinite loop and that's why it doesn't end?
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