DuckDNS with local Unbound and dns-01 challenge

[markster1700]

I run local Unbound DNS resolver for my network and I use Duck DDNS for public domain.

I use acme.sh to issue and then renew certificate. Recently I received an error about missing TXT record when trying to renew the certificate. I tried finding the solution on the internet and here ,but I could not find any solutions. Unbound DNS does not have any API's to dynamically create TXT records for my domain. And since I use a split DNS I am not sure how this can be configured.

The only thing that worked for me is to issue call acme.sh --issue call again.
Is there a solution this issue and if it is anyone care to share?