Mecanim: Speed increase not affecting currently playing animations

Hello,

I have a scene where a player is slowed down dramatically, but only for a second. If they start a movement, such as a sword swing, during that period, it starts out playing very slow (as expected). However, when the speed is increased, the current playing animation does not speed up, it remains slow until it has finished (which, at this speed could take 2-3 seconds, when it should only take a fraction of that).

Any way to change the speed of the currently playing animation?

Thanks!