Throughout my time playing For Honor on the PS4 I had my fair share of the connection issues that are often a main complaint about this game. I would get disconnected roughly every 5 matches or so and after the first patch it became much worse, getting disconnected every 3 games or so. There was even a time that I could get 10 games in a row that I got disconnected from midway through. This is definitely a stark contrast from any other multiplayer game I've played using the same exact setup.
Then I decided to try directly connecting my PS4 to my router with an Ethernet cable and now my problems have almost entirely disappeared, so far I've only been disconnected once and while I still get the pause when someone leaves a game, it's nearly nonexistent relative to how often I used to get it.
So if you have the same issues and are using wifi, you definitely gotta try using a wired connection.