bug#40090: rm seems unfinished when calling mkdir

[Boyen, Peter]

When I remove a folder by using rm -rfv ${TEMP_STORAGE}', shortly followed by 
an 'mkdir -pv ${TEMP_STORAGE}' to recreate the same folder, I get
mkdir: cannot create directory './temp_storage': Operation not permitted
It seems the rm command is not fully finished yet, somehow.

  *   I am running a Linux container on docker on Windows 10. The error occurs 
on a bind mount (and only there).
  *   It only happens If there is quite some data in the folder, so it seems 
the rm command has to take some time
  *   Other commands like ls and such can be run in between, but if I do 'sleep 
5' in between, it doesn't occur (though obviously I don't want to do that every 
time).
Version info:
Docker desktop 2.2.0.4 (43472)
# uname -a
Linux 32b0494e3950 4.19.76-linuxkit #1 SMP Thu Oct 17 19:31:58 UTC 2019 x86_64 
GNU/Linux
(The image is based on the debian:stretch image)
# mkdir --version
mkdir (GNU coreutils) 8.26
# rm --version
rm (GNU coreutils) 8.26

Thanks,
Peter