Hm. I don't see that behavior. What I see is that the file that was copied shows up immediately in the Dired listing of the directory where it was copied.
Did you try with
emacs -Q and then just loading
If you do need to force reverting for some reason, and you don't want to use
g, you can also try periodic auto-reverting.
The Emacs manual, node Reverting tells you:
You can also tell Emacs to revert buffers periodically. To do this
for a specific buffer, enable the minor mode Auto-Revert mode by typing
M-x auto-revert-mode. This automatically reverts the current buffer
every five seconds; you can change the interval through the variable
But again, you should not have the behavior you are seeing. The copied file should show up in the target directory listing.