Ekf lane switch error

Ekf lane switch errors and ekf velocity errors. I am getting these on 4.3.5 when transitioning into vtol when landing. Everything else has been working great. I did change the transmitter a while ago but had a decent number of flight since then. The problem seems the worst on a failsafe rtl mode. Ekf velocity is red at this point. I tried to upload the photo but its to big.