ansible AWX is connecting through ssh as root instead of user defined in credential

I'm running ansible 2.6.2 and awx 1.0.7.2 on rhel 7.5. AWX is connecting to my ssh proxy as root instead of the defined Credential user.

My playbook contains the following

become: yes
become_method: sudo
remote_user: remoteuser
ansible_user: remoteuser

ssh.config in my playbook contain the following

match host !proxyA,!proxyB,* exec "ssh proxyA nc -w1 %h %p &>/dev/null
  ProxyJump proxyA
match host !proxyA,!proxyB,* exec "ssh proxyB nc -w1 %h %p &>/dev/null
  ProxyJump proxyB

My AWX credential user which uses an ssh key and associated with the AWX JOB Template is this (which should be used for ssh connections): remoteuser

I have no defined entries in /etc/ansible/ansible.cfg or any ansible.cfg defined in the current working directory (of the playbook) or in $HOME.

Here is the proxyA/B syslog entries showing the user that AWX is connecting as:

sshd: Failed publickey fro root from 1.2.3.4

And here is the AWX ansible output showing the connection as 'root' instead of the 'remoteuser'

root@proxyA's password: root@proxyA's password: root@proxyA's password:

I can run the playbook through ansible (outside of AWX) without errors.

How do I tell AWX to use the right user name?

According to https://docs.ansible.com/ansible/latest/user_guide/playbooks_intro.html

it should be remote_user: if it still does not work, run the playbook with -vvvv and add the log to the Q&A.

StackExchange DevOps Q#5220, answer score: 1