BUG! Unity Editor CPU spike when viewing LineRenderer component

Hi,

Is this is a known issue? If I have a LineRenderer component opened up in the editor (as in the arrow is dropped down and I can see all the settings) - Unity CPU usage goes through the roof.

But as soon as I click the arrow to shrink it back up, CPU is back to normal again. No other component does this to my CPU when using Unity Editor.

Is there anything I can do to fix this?

Cheers, Keith.