Certificate Transparency check failing in Charles Proxy

I tried sniffing packets on my iOS app using Charles proxy. I added the Charles Proxy certificate on my iPhone trusted certificate store. I have the certificate transparency flag for my app turned on, which is provided by the iOS platform. I was able to sniff the packets successfully.
As per my understanding, on the client-side, if the Certificate Transparency check is on, it checks for the validity of the SCT. Why I was able to sniff the packets successfully? Why didn't the SSL connection terminated as the certificate transparency check was on?
Certificate Transparency check failing in Charles Proxy
 
 
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