Object's texture disappears when zooming in [Solved!]

Hello! I only recently started experimenting with Blender and mesh-editing, so I'm a complete newbie to this. I wanted to convert the rubber duck toy into a decorative item (so my sims would stop cleaning it up), and after a lot of trial and error and help from this forum I managed to do it. However, now when I tested the item in the game it seems to work otherwise fine, but when I zoom in its texture disappears:



Like I said, I'm totally new to this so I don't even know where to begin trying to fix this, so any help would be very much appreciated! The .package file of it is here in case that helps.