Those network issues are getting worse and worse. Last days, I'm getting disconnected with ERROR from like 50 % of 4v4 matches. Connection synchronisation occurs multiple times in a single match. I'm on 100 MBit connection, PS4 in DMZ, green NAT and never saw any issue with other game in 5 years.

I have even recorded a video showing more than 20 session synchronisations in single Brawl match, without anyone actually leaving a game. I felt like I'm playing some turn based game. Unfortunately, this is becoming reality in For Honor.