Vertex Color/Paint problem

Hello everyone.
Sorry for my english, i hope it’s understandable.
I try ti use vertex paint tool on my object (house). Use simple material with 2 textures combined with Lerp in base color and Vertex Color function.
But when i apply textures in my instance material that happens: house becomes red.

This is RGB color view mode in Vertex Painting mode:

When paint, red color dissappears, when erase my OK texture appears (brown one).

Every texture loaded with default compression settings, RGB, 8 bit, .tga format.

Can anyone help me with this?