Surface appearance + texture glitches

So, in the last few weeks, I noticed a very strange and annoying bug related to surface appearance.

Yesterday I added such wood texture to my car:

(including color map, normal and roughness) however when I joined the studio today hour ago, I noticed that the texture was gone (there was just default roblox gray color). Every texture ID remained on their place, but they just didn’t work. I fixed it by uploading the color map again.

Extra, I can’t understand the fact why usual mesh got two different textures, and two different material?