With mirror modelling, triangle in the middle does not become quad

[Cub0use]

What are you trying to do, and what do you expect to happen?

Using mirror modelling, moving the vertices of a triangle face away from the middle.

What happens instead?

The created face breaks the symmetry of the model.

https://github.com/JannisX11/blockbench/assets/81629481/5bba4fff-3400-4c71-875d-e83100aae204

Model format in which the issue occurs

Generic

Blockbench variant

Program

Blockbench version

4.9.0

Operating System

W10

Installed Blockbench plugins

N/A