Mecanim Animation Gets Stuck

We have an issue that occurs rarely and is difficult to reproduce but is game-breaking.

Essentially we have a user control that can be disabled by our enemies. When the enemy disables the control, it sets a float that is passed to a blend tree, which in turn selects a different type of visual effect animation. At the end of the animation, we have an animation trigger that calls back to the control to re-enable it.

The issue crops up when the state machine is in the disabled state, but the animation itself is not playing. This means the enable trigger never fires and therefore deadlocks the control permanently.

We have created a sandbox scene to help debug this issue but so far cannot reproduce it (only happens in the heat of the moment during gameplay)

We have put in specific checks to ensure that the animation doesn't play if it's currently playing but the issue still persists.

Does anyone have any experience with a animation that is stuck in a state but does not play the actual animation ?

Thank you