Delirium Bugs

To preface, Im not sure if Delirium is supposed to work like in POE 1 or not. But Ive experienced the following things which I think are bugs.

1) Failure to start. I went through the mirror and I got the fog effect/voice line, but no delirium monsters appeared and the reward meter never filled from killing mobs.

2) Failure to continue. I start the delirium and it works, but then somehow 6 seconds later Im already getting the countdown timer despite traveling in the direction of the fog and blasting mobs as fast as I can. Even if I just zoom past everything it doesnt seem to matter and the timer just goes to 0 and it ends within 15 seconds of starting.

3) Failure to stop. In some cases the opposite has happened. It doesnt seem to matter what I do somehow I never get the timer. In one case I full cleared a map down to 0 mobs, including backtracking, and even when the last mob was dead the delirium didnt end and I had to manually end it with the button on the lower right hand corner.

I'm having the same types of issue mainly that the fog speed is completely different every map