Space time chart not starting from origin

[SharglutDev]

What happened?

With certain path, there can multiple waypoints at position 0 (i.e. Paris Nord - Lille Flandres).
When it does, the curve of the space time chart doesn't start from the first waypoint but the last at position 0.

What did you expect to happen?

If some OP are overlapping, only the one asked by the user should be kept, and the GET should start from there. Same thing for STDCM (see comment below).

How can we reproduce it (as minimally and precisely as possible)?

1. Add a Paris Nord - Lille Flandres train
2. Check the space time cart

On which environments the bug occurs?

Deployed Storybook

On which browser the bug occurs?

Firefox

[axrolld]

Most likely the same thing happening on STDCM. I asked for a departure in Rennes RF here :

[jacomyal]

Oh, I didn't know that there could be multiple waypoints with the exact same position. I'm not sure what is supposed to happen in these cases @thibautsailly.

Also, the current behavior will be impacted by PR #919, that handles SpaceTimeChart splits.

[thibautsailly]

I'm not too sure how this should be dealt with and will ask users about it as quickly as possible.

[thibautsailly]

Um, I'm sorry but a misclick while on the train closed this issue…