When the Saviours are leaving Alexandria, the sound of Daryl's motorbike engine is cut short too early.
After Michonne wakes before the intro credits, the "American Morse Code" sign on the wall has an 'N' improperly labeled. 'N' Should be dash-dot, instead it is depicted as dot-dash, which is the letter 'A'
The group behaves as if they have completely forgotten The Governor running them out of the prison and their constantly being ambushed. Not only do they not leave the region, they are yet again ill-prepared to defend their home from a mere dozen or so people. Not just that Negan and his group could easily be ambushed and gunned down, but Rick and the others are actually surprised when Negan shows up.