They did this so that a decaying note can go across a pattern change without the effects suddenly changing. So technically not a bug.
But that whole idea goes down the drain as soon as another track triggers a note. And the whole behaviour becomes unpredictable when chaining patterns.
Incidentally, this also makes the audio inputs pretty much useless…
This, and the input volume being saved on a per pattern basis are the reasons I have the inputs plugged up with rubber dummy plugs. Maybe with the new class compliant mode and an ipad I might use them some day.
It’s just as weird as the Digitakt inputs not having a dedicated monitoring function, and them being labeled as left and right while summing to mono.