Push Press - Neck Pain?

Since this has happened the last couple of times I have tried to push press (and subsequently stopped, just doing regular strict military press for now), I thought I’d ask what people think is going on.

Only when I push press, when a rep is complete I feel immediate tension/discomfort on my lower neck, sort of where the ‘v’ from the lats meets the base.

Am I maybe doing something unconsciously with my neck positioning? It generally doesn’t feel like it, I concenrate on keeping it extended and straight… hmm.