Using ip instead of FQDN when prompted for hostname

Hi,

I installed jitsi-meet on a vServer, unfortunately I can not make it work.
Now I was wondering if there are some drawbacks when using an ip adddress instead of a FQDN when installing jitsi-meet.

The quick installation says that FQDN setup is optional

Set up the Fully Qualified Domain Name (FQDN) (optional)

So I think it does not matter if I use ip or FQDN.

Looking at the configuration files I see things like:

focus.10.11.12.13

or

JICOFO_AUTH_DOMAIN=auth.10.11.12.13

So that made me think maybe this is not resolved correctly?
I mean resolving auth.example.com makes sense for me but is it also possible to resolve “auth.10.11.12.13” ?