So it's interesting to see Microsoft actually adding features to this program.
At one point, in 2017, Microsoft was going to remove Paint from the OS and replace it with Paint 3D, but the tide turned in 2019 and Paint 3D is now no longer a default, while Paint remains. Microsoft Paint debuted in Windows 1.0, which came out in 1985, so this app is nearly 40 years old.
Unfortunately, since Paint doesn't have a magic wand tool, there's no way (within the app) to remove the white box. The issue with the white box appeared on several other photos I tried to remove backgrounds from, so it's not a fluke.
