Yes, please shrink the UV mapping of these two problematic texture pool squares a bit. When you look at the texture pool square, you should see that the texture is repeated/tiled on the square.
For example, on the below screenshot taken in SketchUp you can see that the texture is repeated roughly 3 times horizontally and 3 times vertically on the square:
If a texture isn’t tiled anywhere in the model it is packed into a texture atlas when the scene is uploaded. If a texture becomes a part of an atlas, tiling no longer works, so such a texture cannot be used in a material picker for objects with tiling. So, a rule of thumb is that a texture pool square should always have UV mapping which repeats/tiles the texture.