Lumetri color mask handles and segments turn invisible after a few copy and pastes
In my project I have drawn a mask with the pen tool for a Lumetri color correction effect. I copy the mask between different video clips, and suddenly the mask handles and segments completely disappear, only the masking effect remains.
The only way I can get the handles and segments to reappear is to shut down Premiere Pro 2018 CC and reopen it.
Anyone else experience this? Am I facing some sort of bug or is there something I am overlooking?
Image 1 is right after I have opened my project

Then, after I have copied the effect from one clip to the next, I completely lose the ability to see or edit masks on any clip.