Hi,
Waiting is the status of the activity, its waiting to get completed and maybe stuck somewhere in the process. there could be many reasons for your case to be stuck , found one explanation on an article
The flow execution is stuck in state WAITING because, after the last executed action, the next action needs inputs from previous actions that were skipped.
The next action is dependent on the outputs of the previous actions. However, those previous actions did not run due to surrounding If logic.
If the dependent actions do not execute the flow will continue to remain in the Waiting state only.
-Anurag
