2003 Honda foreman 500 slippage???

I always open them up to analyze the stuff they caught, if any. Been a filter snoop since I was old enough to cut them open, even made my own machine to remove the tin from my racing filters, so they could be opened without disturbing the contents. Throwing them away without analyzing them is the same as throwing all my investment money away... ain't happenin' LOL

If you still have that oil filter you just took out, open it up carefully over a bright white absorbent cloth and snoop... you are throwing away evidence and knowledge that you can't find anywhere else on the planet!

A small magnet is handy to quickly sort out the ferrous from non-ferrous stuff after its been dissected. Look for the various colored fragments & chips under magnification and light if you can. Bronze, mild steel, chromium, iron, stainless, paper, cork, aluminum, plastic, etc. You won't need to mess with acids or nothing... just look it all over and identify things... look for patterns... such as quite a few chips & flakes of a certain material present, might indicate a certain part is coming apart, or is about to.

Make it a habit... your Hondamatic filters will alert you to pending troubles long before anything ever comes flying apart.

I use magnets on some of my old motors too. Those good neodymium magnets come in all shapes and sizes on the fLeebay. A wafer shaped one can be added to almost any drain plug with slow-setting JB-weld after roughing them up with sandpaper.

The FB guy might have been a paid corporate troll...? I've been seeing them for many years now working forums & youtube offering "help & reassuring advice", "tutorials" and "how-to videos" that can only insure the problem is neglected & gets worse, or gets purposely broken or permanently destroyed by following their advice or repair tutorial... which result in the hapless victim(s) spending a fortune to buy new. Its very effective when the audience is non-technical or simply overly trusting, which many people are... Marketing companies employ them on contract from industry groups in large numbers. There are some smaller companies & one-man shops that do it on their own too. Some guys set up a few sockpuppet accounts on forums then make posts and start having "conversations" which in reality is just one monkey making a move on your wallet. A paid hit & run monkey can troll 200 forums a day and still find time to make a couple "how-to" vids or tutorials. Watch out for these types of behaviors & patterns on the 'net...

Did you find time to check the oil pressure yet?

Yeah thats my guess... thats a lot of metal there in just 3 folds of paper. They look like chromium steel chunks from a grade 10 or better, ball or roller bearing. Can you find any whitish-yellow/browned/burnt plastic (likely will appear as darkened filaments sort of uneven & chunky looking along their lengths) in there?

Whatever it is shedding those bright flakes is getting real close to coming apart. Next time you open a filter those chunks will be a lot bigger I imagine. Of course, there may not be a next time...

Do you know an old-school craftsman machinist? If so, he can fix it for you.

EDIT:
Well, sounds like you've met a monkey alright. He wasn't very intelligent or you wouldn't have pegged him right away.... so hes probably a pool monkey. The dumbest monkeys are never allowed to free-lance, they get added to tiered pools of monkeys who get simple assignments handed to them and usually get paid per post + word count typed. They number about 2/3 of the total employed generally, they work part time on & off throughout the day/night whenever they wish to log on. The free-lancers are the most effective (destructive) trolls cause they are highly skilled... AND intelligent enough to work unsupervised, or be spoon fed.