Unique Breach Tablet not working in Tower Zone properly (v.0.3.1b)

Item: Wraeclast Besieged Breach Precursor Tablet
Zone: Bluff (Tower)
Waystone: T9 (2-slot-juiced)
Slots:
- Slot 1: The Grand Project Precursor Tablet (1)
- Slot 2: Wraeclast Besieged Breach Precursor Tablet (4)
- Slot 3: Plundering Precursor Tablet of Strongboxes (5 ghosted)

Breach started. But ended like a normal tablet instead of staying open until the last mob has been killed. Worked like intended in normal zones so far.

2nd Try:
Item: Wraeclast Besieged Breach Precursor Tablet
Zone: Mesa (Tower)
Waystone: T9 (2-slot-juiced)
Slots:
- Slot 1: The Grand Project Precursor Tablet (1)
- Slot 2: Wraeclast Besieged Breach Precursor Tablet (3)
- Slot 3: Plundering Precursor Tablet of Strongboxes (5 ghosted)

Breach stopped an the limit like used to without bug.
To provoke errors:
- activated the Precursor/Tower -> Breach was still open
- killed all normal mobs -> Breach was still open
- started to kill the Breach mobs -> while Breach mobs where still up -> Breach closed

Function? Reason?
a) Mob kill / mobs up -> Breach stays open
b) Breach Hands still up -> Breach stays open

Cases/possible bugs - possible explanation/errors from my side:
a) Mobs where still up -> bug
b) Breach Hand collected -> Breach was still up (after killing around a couple of mobs then Breach closed) -> bug

So either the Breach should close after the last Breach Hand was collected or after the last Breach mob has been killed. In either ways the reason for closing of the Breach was again unclear.

Did the Unique Tablet a couple of times in the normal zones and Breach closed always when killing the last Breach mob, so I assume a problem with the "Tower Zones".

Check normal zones again:

- mobs up: Breach Area stays open
- hands up: Breach Area stays open
- mobs down: Breach Area stays open a short time and closes
-> while Breach Hands are still uncollected

Resumée:

- Breach should close after the last Breach mob has been killed

-> if that is the case then normal zones work like intended (with a time hysteresis) but Tower Zones seem to have a bug.