Cloudflare Client certificate stops working

I am using firewall rules to authenticate client with client certificates. It was working fine but from last day It stops working. Each time I request to my domain it blocks the user but user installed the client certificate on its system/browser.
Please let me know If somebody else is facing this issue as it start coming from last day, previously it was working fine with the same flow.

Many Thanks.
Looking for help.

If the firewall is blocking the user then I would check the firewall logs to see why you are being blocked.

So what I should do now? I tried different rules but nothing is working in my favour.

What are the firewall logs saying is the block reason?

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