Anyone seen Portal just crunching to a halt when deleting multiple (5-10) items at once? I tried it and it just wouldn't complete. Just hangs up with a "Deleting..." window still open. When I X out of that window and then delete items one by one, it takes only seconds.
I've used the Python API before to update and delete items. Never had any issues with that.
Good question: I am deleting them through Portal interface. Select and delete. Which in the case of item referencing map services typically wipes our the associated service on the federated GIS server. That's what I was seeing trying one at a time, but it didn't work when deleting in batch. Will keep an eye on it.