Sometimes bad quality ram chips, or set with the wrong timing in UEFI, or just not properly seated ram, can cause problems similar to what you've described. Ane

Sometimes bad quality ram chips, or set with the wrong timing in UEFI, or just not properly seated ram, can cause problems similar to what you've described. Anecdotally I have W11 installed on 5 different machines and none of them have the issues you're describing.