I usually plan routes with Komoot and then transfer those directly to the 1040 (I'm not using Komoot on the 1040).
On my tour yesterday the 1040 massively deviated from the planned course.
I then started Komoot on my smartphone which showed the correct route.
At home I found that the route was changed being transferred to the 1040.
But when I imported the Komoot route into Garmin Connect first and then transferred it to the 1040 everything was as intended.
This is the first time I ran into this IIRC. I'm on firmware 23.10. Any thoughts?