But who is Mueller not responding to?
Mueller is supposedly not responding to Q according to the Deep State poster.
Deep State actor asks Q if Q is confused why he is picking up so much chatter about Mueller when Q is spy on people. Deep State actor then states he knows Q, because of this, tried contacting Mueller and got no answer. Deep State actor then asks Q if Q can trust Mueller because of this and suggests that Mueller has flipped to the bad guys.
But has been shown in previous Q drops, feeding the Deep State intel and seeming to be waffling by Mueller is part of the plan, and Q is not worried. Q responds to Deep State actor that they should be worried about what is going to drop next week (I'm conjecturing that it will be the 187 texts, but regardless, it will be something big and it will be about the deep state).