Setcap followed by chown removes capabilities

$ setcap 'cap_net_bind_service=+ep' cells
$ chown pydio.pydio cells
$ ss -ntlp -f inet '( sport = :443 )'|grep ^LISTEN` # no output
sudo -u pydio -g pydio cells start --log debug

ERROR: Cannot bind to port 443.

Reason chown (after setcap) remove preexisting capabilities.
I thought I’d mention that here.