So it is the unbounded issue per the test below
v1.19:
https://unboundtest.com/m/TXT/_acme-challenge.acme.insect.com/YZHEGHQH
v1.16:
https://unboundtest.com/m/TXT/_acme-challenge.acme.insect.com/OHXNKTQU
The v1.19 isn't returning anything however the v1.16 returns just fine.