I have valid modbus tcp traffic but mbtcp filter does not show it

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Hi, I am fairly new to WS.

I installed the latest version and have generated some modbus TCP traffic between a PLC and a simulator (node red). I can see the TCP packets and the corresponding IP´s and the 502 port used in the messages, however when I add the "mbtcp" filter, it does not show anything. Am I missing something?

Thank you!