Deleting a vertex or an edge from a complex brush will sometimes change the textures on unrelated faces

[bstordeur]

Sometimes when deleting a vertex or edge from a brush, it will change the textures applied to certain faces that should normally be unaffected by the change.

Expected Behavior

Textures should be preserved as best as possible.

Steps to Reproduce

For example, if I delete the selected vertex here :

The triangle on the right will change to lava for now reason :

Map available here using id.wad
vertexdeletebug.zip

System Information

TrenchBroom V2.0.0 on Windows 7, using Valve220 format

[bstordeur]

Map before I delete the vertex. :)
vertexdeletebug2.zip