Duplicated track always mirrors external FX setting

Hi if I duplicate a track and then add an external FX to the first one and then also to the duplicated track they will always share the same setting. For instance I choose ‘Bus 1’ on track one and then ‘Bus 2’ on track 2, track one will now have ‘Bus 1’ selected. If I put track one back to ‘Bus 1’ then now track two will also have Bus 1.

Is this intended?