I'm issuing wildcard certs with plugin v1.13 without any problems.
[Thu Mar 29 19:25:56 MST 2018] Please check log file for more details: /var/log/acme.sh.log[Thu Mar 29 19:25:56 MST 2018] _on_issue_err[Thu Mar 29 19:25:56 MST 2018] Register account Error: {"type":"urn:ietf:params:acme:error:malformed","detail":"Invalid Content-Type header on POST. Content-Type must be \"application/jose+json\"","status": 415}[Thu Mar 29 19:25:56 MST 2018] code='415'[Thu Mar 29 19:25:56 MST 2018] _ret='0'[Thu Mar 29 19:25:55 MST 2018] _CURL='curl -L --silent --dump-header /var/etc/acme-client/home/http.header '[Thu Mar 29 19:25:55 MST 2018] _post_url='https://acme-v02.api.letsencrypt.org/acme/new-acct'[Thu Mar 29 19:25:55 MST 2018] POST[Thu Mar 29 19:25:55 MST 2018] _ret='0'[Thu Mar 29 19:25:55 MST 2018] _CURL='curl -L --silent --dump-header /var/etc/acme-client/home/http.header '[Thu Mar 29 19:25:55 MST 2018] _post_url='https://acme-v02.api.letsencrypt.org/acme/new-nonce'
[Thu Feb 1 17:50:24 MST 2018] Installing full chain to:/var/etc/acme-client/certs/5a73b3f4bea6a8.46110666/fullchain.pem[Thu Feb 1 17:50:24 MST 2018] Installing key to:/var/etc/acme-client/keys/5a73b3f4bea6a8.46110666/private.key[Thu Feb 1 17:50:24 MST 2018] Installing CA to:/var/etc/acme-client/certs/5a73b3f4bea6a8.46110666/chain.pem[Thu Feb 1 17:50:24 MST 2018] Installing cert to:/var/etc/acme-client/certs/5a73b3f4bea6a8.46110666/cert.pem[Thu Feb 1 17:50:24 MST 2018] _on_issue_success
[Thu Apr 5 22:28:34 MST 2018] Please check log file for more details: /var/log/acme.sh.log[Thu Apr 5 22:28:34 MST 2018] _on_issue_err[Thu Apr 5 22:28:34 MST 2018] Register account Error: {"type":"urn:ietf:params:acme:error:malformed","detail":"Invalid Content-Type header on POST. Content-Type must be \"application/jose+json\"","status": 415}[Thu Apr 5 22:28:34 MST 2018] code='415'[Thu Apr 5 22:28:34 MST 2018] _ret='0'[Thu Apr 5 22:28:33 MST 2018] _CURL='curl -L --silent --dump-header /var/etc/acme-client/home/http.header '[Thu Apr 5 22:28:33 MST 2018] _post_url='https://acme-v02.api.letsencrypt.org/acme/new-acct'[Thu Apr 5 22:28:33 MST 2018] POST[Thu Apr 5 22:28:33 MST 2018] _ret='0'[Thu Apr 5 22:28:33 MST 2018] _CURL='curl -L --silent --dump-header /var/etc/acme-client/home/http.header '[Thu Apr 5 22:28:33 MST 2018] _post_url='https://acme-v02.api.letsencrypt.org/acme/new-nonce'[Thu Apr 5 22:28:33 MST 2018] HEAD[Thu Apr 5 22:28:33 MST 2018] payload='{"contact": ["mailto: redacted@email"], "termsOfServiceAgreed": true}'[Thu Apr 5 22:28:33 MST 2018] url='https://acme-v02.api.letsencrypt.org/acme/new-acct'[Thu Apr 5 22:28:33 MST 2018] Registering account[Thu Apr 5 22:28:32 MST 2018] RSA key[Thu Apr 5 22:28:32 MST 2018] _init api for server: https://acme-v02.api.letsencrypt.org/directory[Thu Apr 5 22:28:32 MST 2018] Using config home:/var/etc/acme-client/home[Thu Apr 5 22:28:32 MST 2018] config file is empty, can not read CA_KEY_HASH[Thu Apr 5 22:28:32 MST 2018] _currentRoot='dns_cf'[Thu Apr 5 22:28:32 MST 2018] Check for domain='*.redacted.domain'[Thu Apr 5 22:28:32 MST 2018] _currentRoot='dns_cf'[Thu Apr 5 22:28:32 MST 2018] Check for domain='redacted.domain'[Thu Apr 5 22:28:32 MST 2018] Le_LocalAddress[Thu Apr 5 22:28:32 MST 2018] _on_before_issue[Thu Apr 5 22:28:31 MST 2018] ACME_VERSION='2'[Thu Apr 5 22:28:31 MST 2018] ACME_NEW_NONCE='https://acme-v02.api.letsencrypt.org/acme/new-nonce'[Thu Apr 5 22:28:31 MST 2018] ACME_AGREEMENT='https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf'[Thu Apr 5 22:28:31 MST 2018] ACME_REVOKE_CERT='https://acme-v02.api.letsencrypt.org/acme/revoke-cert'[Thu Apr 5 22:28:31 MST 2018] ACME_NEW_ACCOUNT='https://acme-v02.api.letsencrypt.org/acme/new-acct'[Thu Apr 5 22:28:31 MST 2018] ACME_NEW_ORDER='https://acme-v02.api.letsencrypt.org/acme/new-order'[Thu Apr 5 22:28:31 MST 2018] ACME_NEW_AUTHZ[Thu Apr 5 22:28:31 MST 2018] ACME_KEY_CHANGE='https://acme-v02.api.letsencrypt.org/acme/key-change'[Thu Apr 5 22:28:31 MST 2018] ret='0'[Thu Apr 5 22:28:30 MST 2018] _CURL='curl -L --silent --dump-header /var/etc/acme-client/home/http.header '[Thu Apr 5 22:28:30 MST 2018] timeout=[Thu Apr 5 22:28:30 MST 2018] url='https://acme-v02.api.letsencrypt.org/directory'[Thu Apr 5 22:28:30 MST 2018] GET[Thu Apr 5 22:28:30 MST 2018] _init api for server: https://acme-v02.api.letsencrypt.org/directory[Thu Apr 5 22:28:30 MST 2018] Using ACME_DIRECTORY: https://acme-v02.api.letsencrypt.org/directory[Thu Apr 5 22:28:30 MST 2018] DOMAIN_PATH='/var/etc/acme-client/home/redacted.domain'[Thu Apr 5 22:22:36 MST 2018] Cert for *.redacted.domain /var/etc/acme-client/home/*.redacted.domain/*.redacted.domain.cer is not found, skip.[Thu Apr 5 22:22:36 MST 2018] DOMAIN_PATH='/var/etc/acme-client/home/*.redacted.domain'[Thu Apr 5 00:00:05 MST 2018] Please check log file for more details: /var/log/acme.sh.log[Thu Apr 5 00:00:05 MST 2018] _on_issue_err