If I use a drum or trinket from a Bartender4 action bar RBM doesn't recognize it. I have dragged the drums onto the bar and am using macros for the trinkets. Anytime I use either of these RBM doesn't get it. However if I use the drum from within Autobar RBM catches it and works perfectly. I don't mind using Autobar for it. Just thought it was worth mentioning.
Works fine here from BT4 with or without a macro.
Did you try that while not being grouped? You will get no bars then.