Gap in Front Bumper - any reliable fix?

If someone ever has their bumper off and posts pics of the corner mounting points... maybe we could crowdsource a solution here.

 

Plenty have removed their front bumper cover to replace the valance, hopefully one of those might snap a few photos. I'm mostly interested in a nice closeup photo of what the back of the bumper cover looks like at that corner below the headlight. And, of course, the area with the clip on the body it mounts to under the headlight.

There are several YT videos documenting removing the bumper cover, but none of them show the back side of the cover once it's removed.

 

Just to document it, I am having this on the drivers side. I just noticed it a couple days ago, thought it was odd, gave it a whack and popped it back in. Thought about how it could have happened for about 3 minutes and forgot about it.

Then I stumbled onto this thread yesterday and just went out to recheck it and sure enough its popped out again. Guess I'll be following this thread.

 

Here's a couple of photos from Ebay selling used bumpers, showing the offending spot (passenger side):