Hi @rg305
I am using acme.sh, version 3.0.0.
The command used to renew was acme.sh --renew -d <domain_name>
I have a couple of domains with the same setup, I just took one of them which had been renewed on Oct 29 and was still working properly (certificate chain included the ISRG Root X1 intermediate certificate). I just tried to force renew (acme.sh --renew -d <domain_name> --force) and indeed the new certificates no longer include the ISRG Root X1 intermediate (breaking old Android clients).
This has been working for a long time until now so I must assume something has changed in LE's side. But this wasn't supposed to happen until Feb 2024, correct?
Guillermo