It would be nice to be able to set whether repeating the same note repeats the same voice or not. It makes sense with things like kicks, but long evolving sounds don’t sound great when different notes overlap but two of the same note don’t.
The above clicking issue could also be due to the operator phase resetting at every note, if you turn the PHRT off for one/some/all operators it may fix it (see p.43 of the manual). This does however affect the sound, making it a bit more unpredictable, which in some cases is nice but for most FM sounds, things need to be precise. Worth a try anyway.