ensure contrast edits correct mip level

inspector/src/components/actionTabs/tabs/propertyGrids/materials/textures/textureCanvasManager.ts

@@ -325,6 +325,7 @@ export class TextureCanvasManager {
 
 
     public async updateTexture() {
+        if (this._mipLevel !== 0) await this._setMipLevel(0);
         this._didEdit = true;
         const element = this._editing3D ? this._3DCanvas : this._2DCanvas;
         if (this._editing3D) {