hello I made my beatbuddy master and my aero a slave. Everything worked very well when the aero was in control, but now when I record after a while everything shifts… in the other direction there was something synchronized but now it doesn’t work anymore I don’t know what TO DO. can you help me please?
I don’t have Aeros but first thing I’d do would be to check that all the midi settings are what they should be 
The second is likely something that you know already but just to be sure: Check that the midi connection works 
If those two don’t solve your issue then I’d contact Singular Sound support email
Check this
Turn the tempo knob on the BB and take a look on the screen of the Aeros if the the tempo change too
If yes the midi is correct
If no , check into BB settings if the midi sync is to " Always on"
Better is make a short video and post it here