Point added with addVertexOn is "jumping" upon zooming in or out

[Monfret Augustin]

Hello,

When a vertex is added using the addVertexOn function, the point exhibits a "jumping" behavior upon zooming in or out. The behavior disappears when we drag the map in any direction.

Step to reproduce

1. Navigate to the demo site.
2. Create a linestring
3. Add a point
4. Zoom in or out to observe the point "jumping".
5. Drag the map in any direction, then zoom again. The jumping behavior dissapear.

[Florian Bischof]

@MonfretAugustin we fixed the issue. It will be in the next release of the free version.