Burning file twice in Lightburn but not in LaserGrbl

I not new to CNC world but only been using a laser for about 6 months.
If I do a simple file drag and drop a 50 x 50mm sqaure and set the pass to 1 speed to 2000 and power to 20% or what ever the file burns twice.
I have check for duplicate lines
I have check to make sure set to 1 pass.
Still does it.
Kicker is if I export that same square to LaserGrbl LaserGrbl only do one pass.

Any help or Ideas would be greatly appreciated.

Make a small example file and post it here, it makes troubleshooting easier.

Additionally to the sample file, does it do two passes in the preview as well? And add a screenshot of your LB window.

Give me a few and I will up load. I did notice last night that if I switch to Ethernet connection instead of USB it did not run two passes but if I switched back to USB it again ran two passes.

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