If you create a TextEditor control with MultiLine and ReturnKeyStartsNewLine and fill the control with empty lines by repeatedly pressing Enter:
When you get past the bottom, the control should scroll so that the caret is still visible. It doesn’t.
This only happens when the insertion point is at the end of the text.
Tested on MSW but this isn’t likely a platform issue.
It’s a rather old issue, perhaps a year or so. Before that, it worked OK.