I see this is already reported but just to chime in.
Server 2016, same issue. I already thought this must be something with my OS install... but I see others suffer as well from this. Winrar extraction from the right click menu, and most of the time it won't update with the extracted files.
I think it might depend on how many files are involved or the time it takes to generate/delete the files from the directory - when there is larger number of files extracted it refreshes more often than when one or few files extracted?!
Edit: Oops. I didn't see there is a second page to this thread

. Sorry.