Merged route lines only partially shown on a route details page

On the spot image, routes with merged lines are shown properly (although the line that merges into the main line is not smooth/has a sharper bend at the point it merges). E.g.

https://thetopo.com/beta/topos/lemmikneeme/spots/1-63067

But on the route details page only the part belonging to the route is shown by default:

https://thetopo.com/beta/topos/lemmikneeme/routes/1-413550

Only when hovering over the line or clicking on it in the fullscreen view the whole line is shown: