BUG: Transition effect control A/B preview no longer works in 12.1.2. Build 69
Windows 7, for directional video transitions, under effect controls, the upper left used to show a preview of what the transition will look like when you click on different variations using A and B to represent the footage. Now, it just shows A no matter what I click or which transition I'm using. I can obviously figure out what the transition will look like but that was a nice shortcut to quickly verify I was clicking on the right direction.