I updated my EV1 to firmware 2.18 and can confirm that this solves the track mode issue when using a Garmin MFD. After waiting so long for this update, I am very happy that this story finally came to a good end.
Unfortunately the update introduced a new problem:
My Raypilot 65 remote controller (connected via a E22158 Seatalk converter v2.03) now occasionally beeps and displays "off crs". This happens even in standby mode when not navigating a route. Otherwise the remote controller works as expected.
With v1.11 on the EV1 and v1.21 on the converter I never had this problem.
Unfortunately the update introduced a new problem:
My Raypilot 65 remote controller (connected via a E22158 Seatalk converter v2.03) now occasionally beeps and displays "off crs". This happens even in standby mode when not navigating a route. Otherwise the remote controller works as expected.
With v1.11 on the EV1 and v1.21 on the converter I never had this problem.