Using Up and Down arrow keys to navigate text inside a panel macro jumps the cursor out of the panel.

Summary

Using the up arrow to navigate the lines of text inside a panel macro causes the cursor to jump out and above the panel, regardless of where the cursor is in any arbitrary number of lines.
The same effect also occurs with the down arrow key.

Steps to Reproduce

1. Create a page;
2. Insert a panel macro;
3. Insert some text inside the panel with multiple rows;
4. Press the up or down key to navigate between the text lines

Expected Results

The Cursor moves up/down one line of text

Actual Results

The Cursor "Jumps" outside the panel.

Workaround

No workaround.