Periodic connection error for all Windows Agents V2

[IMBI]

Dear Zabbix Forum,

we're experiencing a strange phenomenon on our Zabbix Server 5.4.7 connecting to Windows Agents 5.4.3. All our Windows agents become unavailable at the same time. The error message in the GUI's Hosts section is:

Get value from agent failed: TCP successful, cannot establish TLS to [[IP]:Agent-Port]: SSL_connect() I/O error: [0] Success

The log shows those exemplary messages before the agents are shown as offline:

16400:20211124:171610.826 Zabbix agent item "service.info["vm3dservice",state]" on host "Mathematica" failed: another network error, wait for 15 seconds
[...other systems...]
16400:20211124:171625.844 temporarily disabling Zabbix agent checks on host "Mathematica": interface unavailable

When the connection becomes available the log shows:

16400:20211124:171725.947 enabling Zabbix agent checks on host "Mathematica": interface became available

We're installing out Agents via a PowerShell-Script

msiexec /l*v "logs/$($env:computername).log" /i zabbix_agent2-5.x.x-windows-amd64-openssl.msi /qn SERVER=Zabbix-Server-IP LISTENPORT=Agent-Port TLSCONNECT=psk TLSACCEPT=psk TLSPSKIDENTITY=K2 TLSPSKVALUE=PSK

While writing this post, I realized that we used the PSK Identity K2 twice for different keys. After changing the Identity of one of the instances, the TLS connections works fine again.
I'll leave this report here just in case anyone experiences similar problems as my search on the forum did not yield any results about this specific problem.

Thanks for this excellent software

Have a great day everyone...