Ableton Forum

Noticing the same issue here.

Single sine oscillator.

Doesn't matter what I do with retrigger, attack or sustain. And it's not limited to the same note.
It happens anytime I play 1 voice legato.

The only thing I've been able to do to (sort of) deal with it is to select 2 voices and do whatever I need to do to make my midi data look/sound like legato. (quantize length, etc.)

If anyone is still wondering I figured out if you change operators voices to 1 it fixes this problem.

found this thread because a friend pointed out the issue.
to me it seems the midi note length was doing this...

Was experiencing the same issue while playing notes, not after recording midi. By deactivating retrigger in the Algorithm worked for me.