Mouse icon gets colored in-game?

[proceduralhappiness]

I’m having the same problem as this guy:

Mouse Icon is colored in game

Hey, greetings. I wanted to make a custom mouse icon for one of my projects. The first time I did it, it worked and I saw my custom mouse. I actually have a video that I sent to a friend while testing it in Studio (video). After a few days I visited my project, this time instead of my normal mouse I saw the one you usually see when you play games on Roblox. During this whole time I did not publish the game and tested it outside the Studio. I published it, but now I see my mouse icon, but it’s c…

The solution he got was using an image label as a fake mouse, and I think I’ll do the same. But I’m wondering, why on Earth does that happen?