Laser doesn't turn off when it's moving from one object to another

My laser doesn’t turn off when it’s moving from one object to another.
(I have a elekslaser A3) The result is there are some unwanted lines. (the picture speaks for itselfs)
What can I do to correct this.

Super thanks, $32=1 did the trick

$32=1 worked for my Two Trees laser, too. Thanks for the great tip!

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