Bug: Peculiar interaction between \\wsl$\... pathname and copy command

Here is a simple demo of the incorrect behavior:
> copy \\wsl$\Ubuntu-21r10\home\larrybr\.bash_aliases \Tmp\
\\wsl$\Ubuntu-21r10\home\larrybr\.bash_aliases => C:\Tmp\.bash_aliases
TCC: (Sys) The request was aborted.
0 files copied 1 failed

I expect a copy to occur, much like this:
> xcopy \\wsl$\Ubuntu-21r10\home\larrybr\.bash_aliases \Tmp\
\\wsl$\Ubuntu-21r10\home\larrybr\.bash_aliases
1 File(s) copied

Or, like this:
> type \\wsl$\Ubuntu-21r10\home\larrybr\.bash_aliases >...

Read more