WAT - Windows ACME Tool

I’m working at the moment on the dns-01 implementation…

I can’t get a verification result (other than ‘pending’) for something like ‘example.tld’. I’m not even receiving an invalid!
My domains have *.example.tld wildcard TXT/SPF records.
Is this a known problem?

For test.example.tld it works without problems.

It seems like this poor guy stumbled across a similar problem. In his case it was something about case sensitivity.
I can rule that out. Tested random uppercase changes with nslookup and unboundtest.com
All show the correct acme record / hash.

Any idea?

And before any on asks for my implementation: here you go