It was more user error simply due to plugging in a midi controller. Users were accidently sending cc93 from an external controller unknowingly and with no marker in the digitakt ui to signifying things were muted this caused major problems. The only way to unmute tracks when solo was activated was to unsolo and with no indicator what track was soloed even experienced elektron users had issues.
I do wish they had found a different implementation rather than removing it though.