Question Rocket league changing when restart epic games or restart pc

[Milan0308]

My problem is that Rocket League changes almost every time I restart it. Namely, input lag changes and sometimes the gameplay is faster and sometimes slower, it's like the camera is moving more and sometimes not (I don't adjust the stiffness), graphics glitches. I'm wondering if anyone else has this type of problem with the game? I'm not adjusting anything and I've tried a lot of troubleshooting. I haven't really tried other games because I don't have that much time, but I'll try it with another one. I suspect it's not my computer that's bad. So I'd be interested to see if anyone else has experienced this, because I can't find a similar problem online.
Pc specs:
-ASUS B660M Plus wifi d4
-I5-12400f
-DDR4 4000MHz Trident Z (from qvl list)
-Rtx 3070Ti
-750W Coolermaster MPE-7501-ACABW
-Kingston 1Tb ssd
-Windows 11 24H2 (now)
-Windows 10 (I tried with)
-Dell G2723H
-Irid 503 argb V2: intel stock fan (cpu), 3 front and 1 back.

Tried:
-another gpu driver (now 366.36)
-DP and HDMI cable to monitor
-fast boot/startup off
-game bar off
-gpu PCIe link speed gen4 to gen3
-game mode on and off
-another mouse because old one was bad
-another RAM
-XMP and JEDEC RAM
-Nvidia control panel basic settings (high performance and prefer maximum performance)
-I do not use any sync
-talked with nvidia, microsoft even epic games about it
-a lot of hardware stress test
-another ethernet port from another router

Thank you if you read that. I'm mostly interested not just in finding a solution, but in seeing if anyone else has had this problem.

 

[Lutfij]

-ASUS B660M Plus wifi d4
BIOS version for your motherboard?

-750W Coolermaster MPE-7501-ACABW
How old is the PSU in your build?

I haven't really tried other games because I don't have that much time, but I'll try it with another one.
If the issue is widespread on other titles, than it might be a driver, drive, OS or hardware issue. If it's just one game, then the issue might be with the driver or the game's engine.