When previewing shaders in your inventory screen, the shader menu automatically resets to the top of the selection menu. For example, say you have 3 pages of shaders, and you right click to select a shader from page 3, it'll preview the shader but reset the menu to page 1. This can lead to mishaps where you accidentally apply the wrong shader, as you'd apply one from page 1 instead of the desired one on page 3, etc. It's also incredibly cumbersome & inconvenient attempting to preview a particular item with numerous different shaders, only to have to scroll back after each one. If a better explanation or video would be helpful, just let me know and I'll record one!