It's inevitable now IMO. If this is in fact true what happened then it's only a matter of time.
Don't think it will be in winter unless this escalates.
I will say this though, we will see his true character now in how he reacts. Take it like a professional and get on with it or act like an immature young player.
Why is this such a big issue? He was in a bar-fight and turned up late from training. Always grounds for a big fine. Allegri even let him play the final mins against Roma as well FFS. Storm in a teacup.