VCs disappear when changes voicecolor

[MinusDeath]

Acknowledgement

• I have read Getting-Started and FAQ

🐛 Describe the bug

Can't change VCs' suffixs
This is a VB fully supported by CVVC, but when I tried to change the voicecolor, VCs just disappeared and notes are turned into CV.

1722082575453.mp4

Explains how to reproduce the bug

1. Update OpenUtau to ver.0.1.529
2. Load a CVVC VB
3. Set voicecolors
4. Change CLR

OS & Version

Windows 10

Logs

log20240727-err.txt

[MinusDeath]

I've noticed similar problem in the past, but it hasn't been solved.
The former one: #970
This is a same issue as well：#1222
The VB in this issue has every voice color with VC transitions.
And, this problem is not limited to the current version. I have no idea how to solve it when using ver.0.1.327, so I update to the latest one. But disappointingly, the problem persists.
If you can't fix it, why not consider adding a feature to rerun the phonemizer? The changed notes can't go back to the original CVVC in most time(unless you keep pressing crtl + Z until everything gets back to the start), the VCs keep missing even if you manually select the original CLR.

[BagelHero]

Huge apologies for the inconvenience on this.

It does seem to be a fairly complex issue regarding how the phonemizer applies expressions and colors... certainly it seems several phonemizer developers have attempted to rewrite and fix the issue, but currently it seems no fix was found.

I've gone ahead and added it to the known bugs page now, and linked back here. Hopefully someone can pick it up and fix it properly soon, not being able to use multiexpression CVVC vbs seems pretty basic.