I use to oc my graphics card - Asus RTX 2060 Super Dual with the GPU TWeak III. I got the newest version. When log off to the login screen and then log in, I have to restart the tweak to keep my ram overclocked. It keeps the standard value for ram, if I do not restart it.
This also happend before with older versions of the tweak.
I think it's a bug, an issue that has to be fixed! I'm nearly sure, that it is not depending on my system.