Vision with 8.1.24
I think there's a bug with the shelve timer(s).
If I shelve a few alarms for 5 min, delete them from the shelve, and then re-add them for say 8 hours, the alarms will still come off the shelve after 5 min. Within the shelve list they show the 8h timer but within Ignition they must still be linked to 5 min.