nslookup failed with "address in use"

Job #4755616 failed for d88042f8:

This was with FreeBSD 14.

[ant:tests/system/nslookup_tmp_x9j12m75] marka% more nslookup.out7
Server:         10.53.0.1
Address:        10.53.0.1#31594

cname-dual.example.net  canonical name = dual.example.net.
Name:   dual.example.net
Address: 1.2.3.4
;; UDP setup with 10.53.0.1#31594(10.53.0.1) for dual.example.net failed: address in use.
;; no servers could be reached
Name:   dual.example.net
Address: 2001::ffff

[ant:tests/system/nslookup_tmp_x9j12m75] marka%