Queued flasks instantly consumed after specific skill usage (not sure if bug)

Scenario:

- Have Hypothermia in "E" slot.
- Have Frost Bomb in "R" slot.
- Have Eye of Winter in "T" slot.
- Have Energising Bolt Flask Effect cosmetic equipped (to be able to watch flask charges getting used).

While playing:
- Have several (over 10+) queued flask charges. (Lightning bolts periodically hitting character from cosmetic)
- Cast, in order, E->R->T
- All queued flask charges are instantly consumed. (A flurry of lightning bolts hit the character).

Oddly enough, it doesn't happen when casting Eye of Winter through "Q" slot (in any order).