It looks like you're new here. If you want to get involved, click one of these buttons!
Using Linetype Batting to indicate building insulation, I vary Linetype scale to adjust the width across the sqiggles, to suit the width (insulation thickness) to be filled. Thus for 200mm thick insulation, I set Linetype scale to 0.1; for 50mm thick I set it to 0.25. This works fine in Modelspace, and up to now also comes out the correct width (insulation thickness) in Paperspace Viewports.
Now all of a sudden, insulation that is correctly showing as 200mm thick in Modelspace, is displaying wrongly as 100mm in a 1:50 scale Paperspace Viewport, correctly at 200mm in a 1:100 scale Viewport, and so on - in other words its display in Viewports stays same on-screen thickness, instead of getting thinner and thicker when the rest of the Viewport changes scale.
See attached - look at Paperspace tab 41, compare with Modelspace.
Some setting? They all looks the same as in other dwg files where it works fine.