I discovered this morning that if I rebuild the flight as a new flight and pick the same waypoints the changed user waypoint names previously created do show on the chart.
But the original flight route still does not allow the name to show on the chart.
I looked a bit deeper into your route, and the issue is that your highlighted coordinate waypoints are in DDMM format (e.g. 4349N) which is currently not of high enough resolution to be converted into user waypoints. Your other waypoints are in format DDMMSS (e.g 444300N) and can be converted into user waypoints. When you define a coordinate point within Charts (Right click > Add to route) you automatically get the supported DDMMSS format.
We’ll look into adding support for DDMM too.
As a workaround for now, convert all points to DDMMSS, like so: CYOW DCT 444300N0753100W DCT CNL3 DCT 442158N0755901W DCT CYGK DCT CYTR DCT 435200N0784300W DCT CYOO DCT 434900N0790400W DCT CYTZ/26