I was unable to reproduce it either. On a retest I was able to select the transition, the waypoints displayed correctly and the FMS flew the magenta line as charted. Perfect!
However, now I’m confused and feeling a bit foolish trying to figure out what happened. ATC changed from the ILS to the RNAV just as I reached DSNEE. In my rush to reprogram, I might have just missed it. But I then flew 2 test flights immediately after to check before I even considered posting here. I must have been doing something incorrectly. All good and marking this solved.
Oh well. I am getting old! Thank you for the great support and wonderful products.