SSL connection to Cloudflare error

On some (not all) devices, clients can’t connect to Cloudflare (, without HTTP code error), free plan, min tls 1.0, max 1.3, ssl full.
OpenSSL on that computers fails after ClientHello, REST clients too ( LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to )
What can I do to fix that? Is this local problem on devices? All routers and devices had rebooted several times.

It looks like it responds all the way down to 1.0.


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