Again another update .......

I have an ROG Swift monitor 2560x1440p 144hz and with my 1080 i get 80-90fps in game. Sadly for some reason after 4.5 the games no longer like my fps, if i lock my game to 75 or 30 fps the game plays as normal but if limit it to 144hz or no frame limit at all the game 90002's me like before.
What is going on I would love to know, I can't see a reason why me having high fps would make the game disconnect me like this when the game itself says I have an excellent connection.