Sadly this issue persists for me. I have found that it doesn't matter which version of
Nintendont I use, official latest, official latest before BBA was added which supposedly made it less stable, the CrisMmmod version, or Send0r versions. And it doesn't matter which options I enable or disable, I've also tried switching to a much smaller 2GB SD card to contain the
Nintendont files, to the same results. After switching to Tiramisu, my dedicated individual GameCube game channels will only fully boot and not freeze very rarely, most times they'll freeze after getting into the vWii mode, but before the GameCube bootup starts, as shows off in the imgur vids quoted above. I've found it also doesn't matter which version of WiiVC injector I use to create the channels either, be it the official version or the mod version.
Yet if I boot
Nintendont as its own channel it will work fine without issue. This was never an issue with CBHC, and I'm surprised no one else is having this issue. I'm genuinely not sure what would make my setup unique at this point. I have a custom theme and wara wara plaza, as well as a very loaded Wii U menu with many titles and injects, but I can't understand how any of that stuff would interfere with vWii functions, or why they would sometimes not be an issue either. I'm hitting a brick wall here, and since the creator doesn't recognize the issue as he couldn't recreate it, I fear I may sadly have to revert to CBHC. The return of the quickboot GamePad menu truly is great, but losing the ability to reliably quick launch all my favorite GameCube games as their own channels is feeling like a real dealbreaker as time goes on.