Hi Hellen,
it works for me. I did not put 'snap to grid' on but that does appear to be what ‘Cleanup’ has done. Widgets and Stage Manager are off. It’s only my 3 external HDs that get moved.
I have a row of folders along the top and 2 columns of icons on the right. I put my 3 external HDs along the top right and after Cleanup they have all stayed where I put them. None of the files has been corrupted or moved.
I cannot believe how consistently annoying and troublesome Mac can be. Updating every new OS version promptly has caused me no end of trouble. I principally use the Mac for music production using Cubase (which endlessly crashed.)
My considered advice would be not to update a new OS until they fix all the bugs. But how do you know what they are and when they are fixed? You don’t know what it is you don’t know.
If I’d known 2 years ago what I know now I would have stayed with Windows!
Cheers,
Stewart