vagrant gull
This may apply to other things as well, but I only noticed it when batch editing decals. If you select more than one decal and change an attribute in it (like color), it will also change all the other attributes in the editing selections window, like path, rotation, and scale. It's a little annoying, but you can at least get around it by copying everything into a text editor.
The issue here is that if you do accidentally change multiple decals within Lonn, you won't be able to undo this change. It's not included in the history, so you're stuck with whatever happened.
Ideally the editing selections window would only make changes to the values that you changed while it was open, but if not, then having the ability to undo changes would be helpful.
acoustic harness
bleak moss
mystic vigil