Several people are reporting this now. Ive tried everything from reinstalling all drivers and the game, but nothing helps.
To recap: Ive tried changing all the settings both before and after the reinstall, even lowering the rendering distance, but it still happens. Ive tried closing all other programs and have nothing but Minecraft running after a fresh restart on the computer, and still it happens.
It starts of using a tiny part of my memory but increases the use for each 2-3 seconds until it maxes out and freezes up the game.
Its a memory leak. Ive tried removing all addons and other resources and just playing a locally stored world as well as testing it on a Realm, but the problem continues to happen. Also tried updating all my drivers, restarting my computer several times and reinstalling the game at least twice. On my 8 year old gaming laptop the game functions perfectly, but on my 2 year old gaming desktop its unplayable.
Can confirm, it also helped for me Disabling the Improved Input Response