Been fishing circle hooks the last few years, easier quicker releases---Generally.
I've had a couple occasions where things have not gone as planned, and in both cases, plus a near miss, the circle hook has completed gone through the jaw (including the hook eye), and my attempted release has ended badly with the fish simply threaded on the leader. All of these have been small fish (never had it with a larger specimen, just skippers. Anyone else have this issue?