I think I remember that was a bug, fixed shortly after with a new version. 1.3. I know there is a link in this forum for all the versions.
All previous versions of LightBurn are available in our version archive, here: [Releases · LightBurnSoftware/deployment · GitHub ]
Here are the posts describing this problem and how to get around till you get a later version:
Not certain but the issue may be addressed with this post in a different Topic: