Issues with Real-time Audio Recording in Bitwig Studio via VST Transit Join

Could you provide some more detail of how you have set this up?

Before investing too much time in VST Transit, note the following announcement:

I don’t know whether VST Join is affected by the discontinuation of the VST Transit service, but in any case, VST Join appears to be a dead product.

Also see my post here where I attempt to understand the various VST Cloud products: