Hi @CodeCharmer
Will renewal always require new DNS acme-challenge TXT?
General answer: Yes. If you want to create a new certificate (a renewed certificate is a new certificate with the same domain name and the same method), you have to create a new order -> new random value -> new DNS TXT entry.
Special answer: If you use the same account and the same system (test or productive system), valid challenges are cached 30 days. So you don't need a new TXT entry.