While inverting color selection the problem can be caused by magnifier and it can stop working. To make the magnifier work you just simply need to follow these 2 steps:
• Press Windows and + key to open magnifier tool
• Now, press CTRL + ALT + I key all together
• This will invert all the colors on the screen and magnifier will work properly.
Know more about inverted colors in Windows and make your system looks better than before.