QGIS » QGIS Application

Working with snapping in 2.6.1. release, we have found a problem with a Postgres/PostGIS layer, when we try to snap a node from a layer to a vertex of another line of the same layer orto another line of other postgres layer.

We hoped that by moving the vertex to the other line, a new vertex was going to be created in the line to separate the segment at the new position (this works correctly in a shapefile) but it seems that the vertex snaps to the line but a new vertex is not created.
We have tested with other lines of other features (layers) and the result is the same. We have tested in a shapefile and in this case it doesn't work either.

The steps to reproduce are the following
1. Load a line layer from a PostGIS database
2. Activate the snap to vertex and segment for this layer. Change the tolerance.
3. Enable the editing in the layer
4. Create one line
5. Create another line and try to snap the vertex of the last line to the middle of the first line
6. Apparently the vertex changes its color to snap to the vertex but we finish the transaction, a new vertex is not created in the middle of the line.

If we reproduce these steps with a shapefile, instead of a postgis layers it works perfectly, a new vertex is created.

We have tried also with features of different postgis layers and the result is the same. The vertex in the middle is not created.

Thanks in advance.