Why can't ansible see the hosts?

Question

Red Hat Enterprise Linux

Tell me please.
Faced the following problem.
Freshly rolled ansible (the hosts file has been moved to another directory (the original is still there in /etc/), registered all the addresses). An ssh-key has been generated and distributed to all managed hosts. On ssh with a key comes without problems. And the problem is the following -
when you try "ansible rhel_server -a "cat /etc/os-release"" - out of three hosts, only one is available.
if done on any machine, from inaccessible "ansible ip_host -a "cat /etc/os-release"" - everything works and responds.

What could be the problem?

in ansible.cfg
inventory = ~/.config/ansible/hosts
uncommented

~/.

ip_hsot3

Answer 1

What does "only one available" mean? does not connect, is not visible in the list or what?
cat ~/.config/ansible/hosts
shows content?
ansible --list-hosts "*" -vvv
shows your hosts ? Do you have your file in the debug comments?