In the character creator, the 'SQUARE' eyes option appears higher up on Windows 10 than it does on my Android device. I have attached a labelled image showing the problem.
I am aware that the square eyes option was previously at the height seen on my W10 device, but appears to have been lowered recently (this lowered height also appears to be the correct one, judging by the preview icon seen below). For some reason, this change appears to not have been executed on all devices?
This issue was fixed by reinstalling Minecraft for Windows.