Erratic trigger behavior

I’m having an issue with the trigger CHOP that I don’t quite understand.

I’m able to isolate quite nicely the bass drum transients from the default song, but then the trigger behaves erratically in a way I cannot understand why --the threshold and other settings I’m using should work and instead its as if a completely different signal is triggering.

Signal is normalized 0-1, there are clear transients happening and a threshold of 0.75 should be triggering but instead triggers seem to be happening randomly. Here’s a reproducible example of what I’m seeing:

trigger_erratic.tox (13.8 KB)

What am I missing? Any help would be greatly appreciated.