What’s really needed is a control that disables the system’s ability to auto-generate lyrics. A manual switch.
Right now the system completely ignores prompts with custom lyrics and auto-generates anyway, even though it claims in the chat box that it will follow the prompt.
So having the option to ‘physically’ turn off the system’s ability to auto-generate lyrics would be invaluable.
If you’re not satisfied with the lyrics generated by Tunee, you can try using the lyric confirmation and lyric editing features~ This may help you achieve a better result.