Yes, this portamento filter behavior is irritating. It should follow the keyboard CV in real time when tracking is on like all the other OBs.
Also, I wish the voices wouldn’t track at the same rate, for a blurring effect, again like ALL the other OB series synths! Or, at least, have the option to have this on or off like the OB8. (Match quantize on or off in page 2)
I hope these are addressed in an upcoming firmware release!