There has already been some work on the placement/size of the text displayed by the Edit Voxel Size operator (seeb65ab29310&0c98bb75cb), so it already sets up a suiting matrix in `VoxelSizeEditCustomData` > `text_mat`. This includes having called `ED_view3d_pixel_size` and this takes into account the UI resolution scale already afaict. So in order to resolve, just remove the multiplication by UI_SCALE_FAC. Fixes #106849 Pull Request: https://projects.blender.org/blender/blender/pulls/131093