Got a replacement. Took super long. Shipping is really taking it's time with them.
But to the topic:
The replacement is exactly like the first CrashGuard I got, blocking the front cam, there's a small shade visible at the bottom of every picture.
Just received mine yesterday & FWIW, I checked the FFC just for comparison, after I read your posts...
It wouldn't bother me if my FFC pix had this issue, so..... you guessed it, I don't have the obstruction/blurred effect.
I just added the requested pictures. Make your own opinion. If you take a close look you can see a slit between the case and the phone right beneath the front cam, I guess that's the problem. But since it occured with the replacement as well... In the zip file are pictures taken with the front cam while the CrashGuard is on the phone (didn't want to reduce quality)
I have the slit/gap as well (can see part of the speaker grill) but, mine is not bowed, the contour on that edge is consistent.
Unfortunately, you just defied the odds of getting two defective bumpers. Based on previous experience working in an injection molding shop, one of (likely) two things are causing the problem.
1) A small bit of plastic on the inside edge of the case is present, basically leakage, or called "flash".
This can usually be trimmed away w/o affecting fit or finish, using an X-acto knife.
2) The bowing effect you're experiencing may also be the result of the molding parameters not being set properly, or needed tweaking, (such as injection mold temperature/cycle time/cooling time/bumper hanging in the mold when ejecting/etc.....) & your case was boxed up & shipped before the QA personnel noticed the issue.
https://www.creativemechanisms.com/blog/what-cause-injection-molding-defects-and-how-to-fix-them
At 1st,I was thinking that it may be the phone's FFC itself, perhaps it wasn't fully extended, but, after seeing your pix of the bumper on the phone, it's evident that the problem lies with the bumper.
I realize all of this does little to solve the problem, but, wanted to post to assure you that it is indeed the case.
Ready for RMA #2, or, gonna seek a refund from Rhinoshield?
Sent from my OnePlus7TProNR using XDA Labs