SSL Error messages in Cluster Host

Have a 3-node cluster that is working well. Am getting random errors in the log regarding SSL certs with hosts that are not part of the cluster. Should I just ignore these?

2021-06-21T01:50:34.436213Z 0 [ERROR] [MY-000000] [Galera] handshake with remote endpoint ssl:// failed: asio.ssl:336130204: ‘http request’ ( 336130204: ‘error:1408F09C:SSL routines:ssl3_get_record:http request’)
This error is often caused by SSL issues. For more information, please see:
Encrypting PXC Traffic

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I would not ignore those. Those are attempts by some other server to join your cluster. I would investigate server and find out what is running on that server and why is it trying to talk to your DB.