Dear Support-Team,
i've got a MX Master 3 mouse and want to use Logitech Flow on two computers with Options+ on my simple private network. Both computers are searching for another Logitech Flow member but can't find anything. I did everything from the flow troubleshooting guide, but nothing works. I tried all support tickets which I found, but nothing helped.

I'm a software developer by myself, so i analyzed it, to give as much information to you:

Both computers are on the same network and can ping each other and can access the network share of each other.
Firewalls are turned off on both sides (I tried other combinations with Windows Firewall and Antivirus Firewalls to allow everything or turned it off completely)
Latest firmware and software given on all participants
Active Ports of PC1 (with Sysinternals TCPView): TCP Listen 59866, TCP Listen 59869, UDP 59867
Active Ports of PC2: TCP Listen 59869, UDP 59867 - (TCP Listen 59866 is missing)
Wireshark tracing of PC1: No packets on right adapter with capture filter (portrange 59866-59870)
Wireshark tracing of PC2: packets sent on UDP 59870
Is there any Options+ software log to find out, why the software can't send any packets?

I invested hours and hours, but I have no idea what to do! :-(

Please help me - I can provide screenshots or more information if you request it.

Thanks in advance!