Patch 5.14 Consistent Game start issues

For any game mode/map, the first minute and a half from the beginning of the game produces consistent stutter lag. After the 1:35 mark, the stutter stops and reappears in the next game. This has never happened in previous patches. I am just wondering if there is anything in this patch graphics related that would be producing this lag effect.

There is another issue with game starts. When Champion select is done and the client hides itself, the game doesn't start. I would have to run launcher.exe again to terminate the running instance of league to reconnect to the game.