I didn't start working with 1.125 until the Christmas rush was done and I finished up the list of scan projects that was stacking up. So the last week has been more about the actual designer software. Guess what, I am having the same issues with disappearing outlines.
I have identified a few circumstances that seem to regularly cause the problem. Avoiding these circumstances MAY help reduce the instances of the problem.
1. Moving (including centering, etc) the outline after it has been created.
2. Copying and pasting the outline.
3. Doing ANYTHING with multiple items selected.
I won't say that these will cause the problem 100% of the time, but they seem to cause it often enough that I just try to stay away from them.
It takes more planning (always doing outlines last, for example), and sometimes some deletion and rework to get things the way I want, but I have had better luck when I avoid these operations.