RHEL: Why is there an additional domain name being added to the fqdn in the DNS request

Solution In Progress - Updated -

Issue

The system is appending an additional domain name string to the name being resolved and the name resolution then fails.

$ tshark -r trace.cap -Y "dns.id == 0x8941"
161 538.904383  172.16.1.10 -> 10.100.10.5   101  Standard query 0x8941  A HOST.SubDomain.Domain.Domain
162 538.904705  10.100.10.5 -> 172.16.1.10   152  Standard query response 0x8941 No such name

Environment

Red Hat Enterprise Linux

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