When flying y Phantom 4 Pro Plus I get a contined warning: "Breaking Now Return sticks to midpoints 1st"  This shows up in yellow on the screen and my drone stops flying. It is like my drone is stopping for a tree and will not fly. It is so bd that I'm unable to fly and have to push the RTH button. No problems when RTH.

Is this after the latest update?

You may need to calibrate the vision system through assistant 2...

I am having the same problem, but in the simulator, right after the latest firmware update.  Recalibrating VPS didn't help.