McGinnis ult randomly stops firing projectiles, although the ult is still active

[back_biter+deadlock]

This has happened to me COUNTLESS times during my gameplay, and many times cost me the teamfight (sometimes even the game)

Please fix this, I have no idea what causes it.

 

[back_biter+deadlock]

The sound is still active, the animation and movement restrictions are still active, but it stops firing projectiles

 

[zombie182]

I confirm, happened to me many times too.
Please fix.