mana burn and low usable mana

I have encountered what I believe is a bug related to mana burn and low mana values. My tinctures turn off at 200 mana burn despite having enough mana regen to sustain over 200 stacks. I've noticed that over time my rather low unreserved mana diminishes by 1 on the interface every 25 mana burn stacks, to 1 mana at 175 and finally turning my tinctures off at 198-199 stacks.


Currently I have 124 total mana, and with my auras on I have 8 unreserved mana with 300 mana regenerated per second. I should be able to reach about 240 mana burn before my mana starts to drain. Turning off an aura to free up mana does reveal that I can in fact go to 240 mana burn stacks.

a video of the issue: https://streamable.com/qnnj3i

lowered max mana to 64 with voll's protector, leaving 4 usable mana. tinctures turn off at 122 stacks, interval for usable mana diminishing looks like every 30something stacks.

if degen per frame value is more than regen per frame then you start to loosing the resource.
If degen per frame is more than currently available resource (mana in this particular case) then the resource actually reaching 0 during the calculation and so all related stuff does happen.

I've run into the same bug and had a guildy reproduce it

I'm playing 2 mana build and also suffering from this issue. Please calculate the regen and mana burn before taking the frame so tincture can sustain expectedly.