I have a problem with getting my MX+, TSX(ascom) and PHD2 to play nicely. I have had some suggestions on settings which will probably correct the issue (PHD2 looses the ability to guide after a meridian flip). However, Leonardo has suggested that it would be better practice to inject a guide recalibration on meridian flip.
Its already possible. Just check the Calibrate box in Sequence, Voyager will inject a guide calibration at meridian change.