briannawi, October 3, 2020 in General Q & A
Looks to me like they are all invisible walls that are connecting "island rooms" . You can turn that behaviour off in wall defaults but I think that can cause other problems. Likely best to just turn off your Walls, Invisible layer when you print.
I'll usually place those walls on a unique layer, than turn the display of that layer off.
I do the the same as Eric. Create a unique layer usually called "Wall, Invisible 2 turn off".. its a couple extra steps you have to do to turn those off, but def. easy to do.
Those are added automatically because you have created "island rooms".
Here is some more info that might help:
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