event.pull("net_msg") not being received by host

[stuffi3000]

Hello,
My network was working perfectly fine until at some point my receiving computer stopped being able to receive the packets I'm sending over with minitel. The switch a few blocks away from my computers shows that the data is actually passing through and I'm sure that the sender has the correct hostname (in quotes as it is a string) in its code.
Neither the Lua environment directly, neither a program is able to event.pull the net_msg it is supposed to receive. I temporarily managed to get it working again by using the second test computer next to it, but as of today this one doesn't work either (it also receives nothing).

I tried to following:

• Breaking and replacing all cables leading from one computer to the other,
• Replacing switches in-between,
• Changing hostnames,
• Switching ports,
• Restarting all PCs in the network,
• Sending messages with usend via Lua and not via the program (nothing is received like this either).

I also can't receive a message sent by one receiving computer to the other...

[stuffi3000]

Well, I reswitched ports and reset once again, this time with success. It's still unclear to me why this happened though so I'll leave this open for now