check_nrpe could not connect to x.x.x.x, connection reset by peer error only on Docker host running the Nagios server

[JojoCon27]

We have five (5) docker hosts [S1, S2, S3. S4 and S5) and have installed Nagios as a container/service. We are also utilizing the NRPE that came with the Nagios image. The NRPE agent have been installed on all 5 docker hosts. The nrpe_checks seems to work on ALL the docker host except for the one running the nagios server. So if nagios is running on docker host S5, the nrpe_checks works the other 4 host but fails on S5 with the error "could not connect to x.x.x.x, connection reset by peer". If the Nagios server is running on docker host S3, nrpe_checks fails on S3, and works on all the rest of the docker hosts.

I've tried running the command with the -n or --no-ssl option, but the checks still fails with "receive header underflow error.

We are running (the default version when the latest version of the nagios image was pulled):
Nagios Core v.4.5.2
NRPE 4.1.0

All docker hosts IP addresses are on the "only from" entries on the nrpe file on the agents.

Is there something I am missing? Any help will be greatly appreciated. Thank you!