Graphic Bug on TFT Startup

[LordHatchet95]

Pretty much the image's self explainatory, but can't skip all the details.
Works OK in-game, works OK the rest of the tools, accepts mods, but I find that the main menu BG doing that could mean some huge issue about a graphical component, either driver, mdl/mdx/txt/all-the-above file associated to the Frozen Throne BG, or so...

I kinda fear this one might affect other graphical components in-game, so, if anyone knows the solution, I'll be grateful about it, thanks.