Flasks used at end of effect not reapplying immediately after going to another area

I've died approximately two dozen times on an aurabot because there's a delay in flasks reapplying after going through a door. I have not been able to figure out what is causing it but it seems to be more prevalent when the flask is about to end and should be reapplying as you enter a new area.

For clarification this is not after a load screen where I would need to reapply the effect and I have confirmed via POB that 100% uptime is guaranteed providing the map does not have reduced flask charges on it. It is very frustrating to die because the coruscating elixir is running but also apparently not running, like schroedinger's flask.