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My post call extraction is giving me this message "Error in parsing JSON for call analysis"

Example calls: 
call_71453dceffbdbacf9d8d96ee96a
call_0a3c58930ff5d046d3914ae609f
call_7609fb7517fe0675c1f492835f7

But it does work for some calls? 
Example where it worked for the same agent: call_a7fa129bbe4adba5c59662335cd

Please help.

please share the configuration setting of post-call analysis and also share the logs

Hello <@1442525900477436027> , I see you are using Gemini 3 flash for the post call analysis , try GPT 4.1 or GPT 4.1 mini.

This seems to have sorted it but I will report back if I notice this again. Thanks <@605090813025976344>