kex_exchange_identification: read: Connection reset by peer Red Hat 8

I see this error very often on my RedHat 8 servers.
I have an rsync cron job to sync my logs from RH 8 to CentOS 6.5 server.
when I ssh between these servers it seems fine, even with the ssh keys.
But sometimes I get below errors with corn jobs.

From user@server.domain.com Wed Dec 2 11:30:32 2020
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Date: Wed, 2 Dec 2020 11:30:02 -0500
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From: "(Cron Daemon)" user@server.domain.com
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Subject: Cron /home/user/rsync-log.sh
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Status: O

kex_exchange_identification: Connection closed by remote host
kex_exchange_identification: read: Connection reset by peer
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: unexplained error (code 255) at io.c(226) [sender=3.1.3]