Black trail appears when function curve touches top of screen

[Shadaki]

Describe the bug

When a function's curve touches the top of the screen, moving the cursor creates a black trail.

Screenshots

To Reproduce

Steps to reproduce the behavior:

1. Go to the Functions app
2. Create the function sin(tan(cos(cos(sin(x)))))
3. Plot graph
4. Move the cursor

Expected behavior

The cursor should move without leaving any trail behind it.

What it is doing

The cursor is leaving a black trail behind it.

Environment

• Epsilon version : 13.2.0
• Platform : actual device

[LeaNumworks]

Hello @sagessylu, thanks for spotting this bug! It should be fixed by #1553.