Uhh, I think you misunderstand the concept I am proposing here. Far as I know, once an investigation being inquired by the game [or sportsbook] provider, the casino themselves [any casino] can't really determine how long does it take, nor influence the speed of the review further than nudging the provider. So, all we can do here is wait.
Hopefully it will only take one or two days for the provider to conclude their review.
Still no update from shuffle team even in this tread also why?
Risking to sound redundant, though with no ill intention or any attempt to sound condescending, I'll repeat: the investigation is very likely requested by the provider and conducted by the provider. Thus, it is out of Shuffle's hand. Only the provider has an answer on when the investigation finished.