Aeros is the master and BB slave. It use to work. All firmware is updated on both devices. Midi Out channel on Aeros and BB input channel match. Meastro >> Aeros >> BB is the setup.
Please make sure your cables are not defective, you may want to swap them around and test to see where the failing point is
There is no issue with the MIDI in the new version of any of the devices
If you have more issues, please reach out to firstname.lastname@example.org for more help and please include a description of your issue with videos if possible.