Thanks for providing more details.
Sorry, but if the stereo insert is placed at the very end of the chain, then you cannot use Force Mono and it will always output in stereo.
If you place the stereo insert at any other point in the signal path, then your proposed setup will work for mono or stereo.
Sorry for the inconvenience, we may change this behavior in a future update but I can’t provide a timeline for that. I’d suggest you try a different setup for now.
