STEPS TO REPRODUCE
1. Build and run the attached test app.
2. Type 'TEST' into the text edit.
3. Press Shift+Enter to insert a new line.

EXPECTED: The caret moves to the start of the new line, with the correct size.
ACTUAL: A correctly-sized caret draws too high on the new line, and an incorrectly-sized caret blinks at the start of the line.

4. Now type another letter T. Observe that the caret corrects itself.

I've attached screenshots demonstrating the problem.