Bad gateway 502 triggered by Cloudflare Ray ID

Hi there, I’m facing Bad gateway 502 triggered by Cloudflare Ray ID.
It happens when I try to download an excel file with more than 5 lines (less than that is ok)
I’ve tried to bypass the full URL (firewall rules), but not worked.

Can you help me?

Is it perhaps taking a long time to generate?

It’s like 2.8s on timing inspector, and 502 occurs.
It works at DEV enviroment where we don’t use Cloudflare.

I’m not being able to solve why this error is trigerred.

Anyone knows, how can I investigate the error with provided RayID?

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