Hey there,
You likely are not doing the MIDI test correctly, if the Aeros is receiving MIDI commands it is working fine.
I do wonder if your experience would improve with the latest beta version 5.0.3
Other users have had similar issues with 3rd party equipment, but 5.0.x has changed a lot about interfacing with other products in general, I wonder if these changes will be positive on your end.
As of now, all similar reports have been solvable by changing some setting on the device. You may want to wait a bit for another MC user to comment or take the question to the MC forum and let us know what you find out!
Thanks for reporting!