A part in sketchup is showing the whole part as reversed and the repair fixes it but makes it disappear. How do I fix it so it doesn’t make it disappear? I’m using sketchup 2017
Upload the SKP file so we can see what you’ve got and give you a proper answer.
As a guess, have you applied a transparent material to the front faces?
I don’t see any faces disappearing when I correct the reversed ones.
Maybe you can show a screen shot that illustrates the missing faces.