Fabfilter Pro-L2 external Sidechain input and Cubase

Hi all, quite niche, but is anyone here using the SC input of the FabFilter Pro-L2 in Cubase successfully?

I’m using L2 on the master and need to export stems that react to the entire mix limiting while they as are bounced individually.

Like this - https://www.youtube.com/watch?v=9jhp1P9CbNQ

Unfortunately for me the L2 doesn’t react the same when it’s set to listen to it’s SC input. I can’t for life of me work out if this is Cubase issue or FabFilter one.

2 pictures:


1 - The L2 working as required on the output

2 - The L2 with stems sent to its SC input. You can see the difference, plus it’s outputting above 0db

They should be reacting the same, and in both instances they are being fed identical audio, just one via the SC input.

Help me - I’m going crazy!

PS - The same thing works fine with other plug ins, Soothe 2 for example…