Paths going invisible in Illustrator?

[#1]

I'm working with objects with multiple paths in Illustrator.  I selected all my paths in one object, moved them slightly, and most of the paths went invisible.  They still exist: I can select them, but not see them except for the selected outlines. 

Command Z reverts the last step, but does not reverse the invizibility

I reverted to my most recent saved version, tried manipulating those paths - no problem.  Then I transform>reflected the whole object, and whoosh, most of the paths are gone again. 

Reverted and tried again, could manipulate for a while, and then was changing one path's shape, and it disappeared. 

Any idea what's going on, how I fix it and get my visible paths back, and avoid causing this problem in the future? 

[#2]

I'm working with objects with multiple paths in Illustrator.  I selected all my paths in one object, moved them slightly, and most of the paths went invisible.  They still exist: I can select them, but not see them except for the selected outlines. 

Command Z reverts the last step, but does not reverse the invizibility

I reverted to my most recent saved version, tried manipulating those paths - no problem.  Then I transform>reflected the whole object, and whoosh, most of the paths are gone again. 

Reverted and tried again, could manipulate for a while, and then was changing one path's shape, and it disappeared. 

Any idea what's going on, how I fix it and get my visible paths back, and avoid causing this problem in the future? 

[#3]

Start by turninmg off GPU acceleration in the preferences and then take the usual steps - updating the graphics driver etc..

Mylenium

[#4]

No dice.  I'm on a Mac and have the latest OS, so the graphics drivers should be up to date.   I've tried turning off GPU acceleration, and the problem still happens whenever I reflect the object - always the same lines going invisible.  So I don't think it's the graphics driver. 

[#5]

Please show a screenshot of layers and appearance panel with thw objects selected.

Also it will help to see a screenshot of the whole artwork with selected invisible objects.

Can you also try and copy them to a new file and do the reflection there? Does that work?

Do you know how to use the layers panel to inspect your file?

[#6]

Any solutions found to this issue?

[#7]

We don't even fully understand what the issue is.

So maybe you can answer the questions asked 3 years ago?

And maybe you want to create a new thread?