Having a regex match (or hyperlink) at the top or left edge, move the mouse out of the window somewhere else and slowly (pixel by pixel) move it back here.

With the default 1px padding, entering from the top or from the left is okay, except if my prompt begins with a URL and I enter the first row from the left. Then it is not recognized until the mouse is over the first cell, I have to advance it to the second cell.

With larger paddings, the issue is much more prominent and starts happening when entering from the top or from the left in any row.

Looks like mouse tracking is not quite prepared for the mouse being over the padding, plus an off-by-one (or maybe continuity with the previous row matters?)