Enabling "Boolean Operators" changes texture of primary obect

[degriz]

# Mandelbulber settings file
# version 2.26
# only modified parameters
[main_parameters]
ambient_occlusion_enabled true;
background_color_1 e000 e600 ff00;
background_color_3 f900 ff00 f600;
detail_level 2;
flight_last_to_render 99999;
formula_1 99;
formula_material_id 2;
keyframe_last_to_render 0;
light1_is_defined true;
mat1_is_defined true;
mat2_diffuse_gradient 0 c3c3c3;
mat2_diffuse_gradient_enable true;
mat2_fresnel_reflectance true;
mat2_is_defined true;
mat2_metallic false;
mat2_name black stone;
mat2_reflectance 1;
mat2_rough_surface true;
mat2_specular 1;
mat2_specular_width 0.578;
mat2_surface_color 0000 0000 0000;
mat2_surface_gradient_enable false;
mat2_surface_roughness 0.04;
mat2_transparency_index_of_refraction 2;
raytraced_reflections true;
[fractal_1]
transf_function_enabledF_false true;

[buddhi1980]

When you use boolean mode, then material is assigned separately for each fractal object (on the bottom of fractal formula tab)