Fix your game!?

First issue: After the update, the game’s online modes have become unplayable. Whenever I join a match, everything is normal for about 5 seconds, and then suddenly there’s massive input delay, making it impossible to play. This issue has only started happening after the latest update.

Second issue: I’m playing the first half with a stable 60 FPS, and everything is fine. But as soon as the second half starts, the FPS drops to around 15. I’ve already tried deleting my profile, but it didn’t help. What could be causing this problem?