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RHEL 7 is in maintanance phase 2, which means

> Red Hat defined Critical and Important impact Security Advisories (RHSAs) and selected (at Red Hat discretion) Urgent Priority Bug Fix Advisories (RHBAs) 

https://access.redhat.com/support/policy/updates/errata#Maintenance_Support_2_Phase

This does not fall into either of these (if it would, it would be already fixed), moreover the tcp_wrappers are deprecated in RHEL7 and not available in any further releases.

Instead of spending more of our time on fixing tcp_wrappers, your time debugging tcp_wrappers and customer's time to setting up rules in tcp_wrappers, I would suggest to move the rules into firewall or iptables, as they can use them also in RHEL8 and newer.