Seven's ult dmg removed by upgrade during cast

[ArkanoidVFX]

View attachment SevenUltBug-00.00.00.000-00.00.13.410.mp4
Steps to Reproduce:

1. Play as Seven, activate Ultimate;
2. While Ultimate is running, upgrade it to level 2.

Expected Result: Ultimate keeps dealing damage with extended duration.

Actual Result: Damage is removed, only extra duration remains.

Reproducibility: 10/10