Thank you so much for bringing this up, I had no idea I was missing out on so much damage due to this bug. I feel like every Feral Druid should know about this.
Anyways, I had this same problem but I wanted my macro to do something different. Here’s what it looked like before:
#showtooltip Cat Form(Shapeshift)
/cancelform
/cast Cat Form(Shapeshift)
And this is the fixed version:
#showtooltip Cat Form(Shapeshift)
/cancelaura Leader of the Pack
/cancelaura Predatory Strikes(Rank 3)
/cancelform
/cast Cat Form(Shapeshift)