Incredibly odd input lag on modded MC 1.20.1 (custom mod pack)

I've been running a large modpack I threw together for a while and before it would run normally say with a few hiccups here and there thanks to the size of it but as of recently I've been having a lot of issues with the input lag such as

• Very delayed inputs upon starting the world (pressing left and right only to move a couple seconds later or delayed jumping

• stuck inputs (moving left or right keeps me moving there for a few seconds and I can't stop until a few seconds pass) or flying (attempting to stop flying only gets the jump button stuck and has me going higher and higher) sprinting sometimes doesn't work (double tapping "W" just makes the game think I pressed it once)

• inputs don't register (opening up the inventory and unable to close it for a few seconds despite pressing "E" or "escape" multiple times)

• This all happens despite having a few of the recommended performance mods in the list (modernfix, ferritecore, embeddium, etc.)

This happened after I updated my pc to the latest version of Windows 11 and for some reason it started giving me severe input lag even though it never happened before (other games got affected too but MC is the one that is still giving me problems)

Any idea how to fix this issue? Thanks in advance!