In the second stage of Veteran Maelstrom Arena, there is a fatal issue with tab targeting. If you target the central device (pictured below) by accident, it is not possible to UN-target it afterwards. All your ranged attacks flow to the center and not toward the mobs! Pressing tab repeatedly has no effect. Eventually, I had to let the mobs kill me so I could release outside the stage and re-enter.
#CAREBEARMASTERRACE