Just for the sake of argument (because I agree that it is not on the verge of imploding), my Camry specs for XX4386 and the 3614 is wider than that filter. Could that have anything to do with that slight concavity? I believe the bypass valve on the 3614 is set for a lower psi than the 4386 as well, maybe by 4 psi or so.
Sirius dude just ran his mouth for effect and to get a rise out of the board. He’s permanently on ignore.
Every filter has some dP even when new, and if was run in very cold climates, the dP with thick cold oil can get pretty high even on a new filter - like up to bypass valve PSI level of dP. The slight "bow-in" could just be from normal dP, and it bowed in until the inside pleats hit the center tube. There was probably a bit of an air gap in that area. But the bow-in can't be necessarily be concluded because it's all clogged up. Can get high dP even with a clean filter if the conditions are right. And if it was loaded somewhat (not fully loaded), then it would take less oil flow to get the dP to bypass PSI level.
That's a side discussion, not related to why the media bowed in a little bit.
The wire-backing could flex/bend too with enough dP. OP said it as ran over the winter months (from October 9, 2023 to March 3, 2024), and he's in a cold climate (Maryland, USA), so that filter most likely saw some pretty high dP just from very cold oil at start-ups. And yes, he was running some engine cleaning exercise, so it probably was loaded more than a normal 2,639 mile OCI would be.
And there can be more than one factor causing what you're seeing.
Not true in every case. The flexibility and strength of media varies all over the place. The media in the Endurance is flexible enough to need wire backing. Doesn't mean it's going to fail or tear if it bends some.
Yes, the OP's filter was loaded more than normal for that relatively short OCI due to running engine cleaning products. Just because the pleats flexed inward doesn't mean the filter is over-loaded. If an engine was revved pretty high with cold thick oil, the dP PSI could hit bypass valve level, even with a new filter. Only way to know how loaded it is, and the effect on the dP vs flow, would be to flow bench it.
What a stupid reply with still no answer to the question. It’s called a “filter cutter” for crying out loud. I can care less about you running your mouth calling someone blind which I take serious offense to. You never cut a filter apart and did what I and other members have done. Just ASSume a filter media is failing. What a total joker.
yeah you were. Told me fly out I’m blind. I’ve never saw a wire backed media filter “collapse”. Ya never cut apart a filter either. Just another keyboard warrior picking on folks.
and start cutting filters apart and then making opinions. Instead of telling someone they are blind. That’s pretty darn offensive and ignorant and disrespectful. The biggest thing is you have zero proof for your accusations and collapsing media theory. I ran a Donaldson thru winter and media showed no signs of collapse. 
All true. Could've been in bypass or maybe not. Filter flex is normal or it's a sign of other problems. You're right hard to say for sure without other tools. Given that what OP sees is what we see it's pretty limited info to drill down. Nothing wrong with erring on the side of caution.
What a stupid reply with still no answer to the question. It’s called a “filter cutter” for crying out loud. I can care less about you running your mouth calling someone blind which I take serious offense to. You never cut a filter apart and did what I and other members have done. Just ASSume a filter media is failing. What a total joker.
yeah you were. Told me fly out I’m blind. I’ve never saw a wire backed media filter “collapse”. Ya never cut apart a filter either. Just another keyboard warrior picking on folks.
I’d seriously stop blabbing
I'd like to see how much air gap is between the center tube and inner pleat edges on a new Endurance. It might even vary by filter model number. The larger the air gap, the more room for the media to bow inward from dP.
Every spin-on filter has some kind of air gap between the center tube and media cartridge, and it probably varies between filters. Could be some Endurance models have more air gap than others. The media couldn't bow in like that unless there was room for it to move inward towards the center tube. If there was say a 1/4 inch of air gap (extreme example), the media could bow in that much if the dP was high enough. The Endurance uses a metal mesh backing, not a plastic/nylon mesh like some filters. With the metal wire backing on the media, it could be that once it bows inward the metal wire mesh deforms some, and that keeps the pleats bowed in.
I just can’t believe when ya look at filter
How much was the media disturbed before that 1st photo was taken? There is a big gap on the right side. Also, hard to say what every filter model in the Endurance line has for a gap between the center tube and media cartridge without inspecting may models. It could vary between models for some reason. Based on the manufacturing QA is these days, it might even vary between filters of the same model depending on manufacturing variances.
