Hello Aurélien
I have looked again at the "Midi CC not always working with wave selection" , and I think it is because the wave selectors are particular to each "bank". For example, if I assign a CC while the bank is "SQ 80 waveform" , it will not work with the "Transwave" bank because it is another poti, and it does not use the same midi CC than previously.
It is the same "issue" than with effect buttons (the bypass is often particular to each effect, in 90% of Arturia's synths (it works fine with OBX A, where the bypass is for any effect).
I do not know if it is fixable, but if it is, it should (I suppose this will also show issues in arturia's midi hardware?).
Solving this kind of issues would make Arturia the best VSTi in terms of midi CC and remote controlability.
I will make overlaays/boards for most arturia's synths Would love to show you the SQ80 overlay , but not yet printed ... will post a pic later this week :-)
Have a nice day !