HAProxy through Pfsense closing connection during handshake

I’ve tried using Acme to generate certs through Cloudflare’s API, and used an origin cert generated on Cloudflare itself. Both seem to leave me with a 520 error from the Cloudflare end, and a failed handshake in the HAproxy logs. Is it HAproxy that doesn’t like the cert that’s causing the error, or did I miss a setting somewhere? If I remove the cert and have HAproxy use one that is not for Cloudflare, Cloudflare throws an “invalid ssl” error, so the certs are working in some kind of way.

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