Ok, I took a look at this. These examples work on my set up and after tracing some stuff down, it looks like you are running the editor using webgl1 and not webgl2 or webGPU. The image textures trigger the issue, because they are non-power of 2. and tiled/repeat. WebGL1 does not support non power of 2 textures with all modes (e.g. tiled / repeat mode).
My suggestion is to work using webGL2 in editor and runtime. If that is not possible, you need to make all your textures power of two, where ever these issues show up.