iOS 16.0.2 - The certificate for this server is invalid - Code=-1202

I'm testing IAPs with Appstore sandbox and just started to get this error log:

2023-09-01 17:31:25.928247+1000 App Name[551:22768] [Default] Error finishing transaction 2000000402881245: Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “mzstorekit-sb.itunes.apple.com” which could put your confidential information at risk." UserInfo={NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9807, NSErrorPeerCertificateChainKey=(
    "<cert(0x10382e600) s: mzstorekit.itunes.apple.com i: Apple Public EV Server RSA CA 2 - G1>",
    "<cert(0x10382f200) s: Apple Public EV Server RSA CA 2 - G1 i: DigiCert High Assurance EV Root CA>",
    "<cert(0x10382fa00) s: DigiCert High Assurance EV Root CA i: DigiCert High Assurance EV Root CA>"
), NSErrorFailingURLKey=https://mzstorekit-sb.itunes.apple.com/inApps/queueCheck/markTransactionDone?transactionId=2000000402881245, NSErrorFailingURLStringKey=https://mzstorekit-sb.itunes.apple.com/inApps/queueCheck/markTransactionDone?transactionId=2000000402881245, NSErrorClientCertificateStateKey=0, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <D68A1174-22ED-49B9-B2F7-811D96E1018E>.<1>"
), NSUnderlyingError=0x281234510 {Error Domain=kCFErrorDomainCFNetwork Code=-1202 "(null)" UserInfo={_kCFStreamPropertySSLClientCertificateState=0, kCFStreamPropertySSLPeerTrust_desc=<SecTrustRef: 0x102d2f460>, _kCFNetworkCFStreamSSLErrorOriginalValue=-9807, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9807, kCFStreamPropertySSLPeerCertificates=(
    "<cert(0x10382e600) s: mzstorekit.itunes.apple.com i: Apple Public EV Server RSA CA 2 - G1>",
    "<cert(0x10382f200) s: Apple Public EV Server RSA CA 2 - G1 i: DigiCert High Assurance EV Root CA>",
    "<cert(0x10382fa00) s: DigiCert High Assurance EV Root CA i: DigiCert High Assurance EV Root CA>"
)}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <D68A1174-22ED-49B9-B2F7-811D96E1018E>.<1>, NSURLErrorFailingURLPeerTrustErrorKey_desc=<SecTrustRef: 0x102d2f460>, client-environment-type=Sandbox, storefront-country-code=AUS, AMSStatusCode=0, NSLocalizedDescription=The certificate for this server is invalid. You might be connecting to a server that is pretending to be “mzstorekit-sb.itunes.apple.com” which could put your confidential information at risk.}

Rebooting the phone, macbook, or restarting XCode doesn't help. This has been working reliably until just now.

When connecting to https://mzstorekit-sb.itunes.apple.com using Firefox I'm told that

An error occurred during a connection to mzstorekit-sb.itunes.apple.com. Peer’s Certificate has been revoked.

Error code: SEC_ERROR_REVOKED_CERTIFICATE

Does anyone know what's going on? Is this an Apple issue and they are just about to fix it?

Thanks