Dave, suggest you try this flight plan KCLTTAPA01. It was created at www.SimBrief.com. This is the plan I was flying yesterday in v188.8.131.52 when the managed speed dropped out in CLB and CRZ. All of my failed flights have been with SimBrief created flight plans. I also load the A319 in TAKE-OFF state in P3Dv4.4.
I'm planning another long flight tomorrow, KCLT-TNCA but I'm going to input the flight plan manually and see what happens re managed speed.
i will send this issue to the developers...
But at a workaround you can use the tower view and then use the free camera (c) and move your view up some feet with the curser key (up) of your keyboard.