Thanks for reporting this.  We are working on a solution.

I have issues in general with icons that are not inside fences behaving erratically when I move other icons. I need to have the non-fenced icons behave as they do in Win10, is there  away to tweak this? Have 2 monitors if this has anything to do with it.

me too ! can not move icon into fences !

My OS: win10 x64

They don't give you details about it being fixed, they just let you know when it's fixed.

I have the same problem when I try to drag icons into fences. I don't know if this will work for everyone, but what works for me is to then drop the icon closer to the fence (for me, usually under since I have the fences rolled up to the top of the desktop). Then if I try to move it into the fence, it works.