I selected "MinervaNeue" as a skin and then tested it out at Internet Explorer 11 in Windows 7. Then I typed just one character in a long section just for a test. Suddenly, the source window shifts/scrolls back up.

I have to go all the way down to see where I left off. I saw the character I typed and the text cursor. Then I added another letter; the source window shifts up again.

Then I resumed typing and saw the window shifting up and down in every millisecond every time I type a character.