Scratch-render: The pen gets drawn in right-angles behind the sprite when manually dragged

Expected Behavior

In Scratch 2.0, if the pen is down and you manually drag the sprite associated with it, you don't get a pen trail behind it.

When the sprite glides:

When the sprite is manually dragged:

Actual Behavior

In 3.0, I'm seeing that the pen does get drawn with the sprite, and it is drawn in very right-corner heavy lines during the drag (but not when the sprite glides or moves due to a block).

The straight lines are from the blocks; the jagged lines are from manually dragging the sprite:

Steps to Reproduce

Use pen down, set pen color, and glide to compare when you drag the sprite vs. when it is moved via block in 2.0 and 3.0.

Operating System and Browser

_Mac OS, Chrome_