2020 KX250 Backfiring

So I was riding last weekend and had a slight tip over in a turn. I recently noticed that my rear tire has been extensively rubbing my exhaust for some reason. It always barely scraped the sticker, but now has been rubbing it a little more.

Anyways, after the tip over I noticed slightly less power, and backfire off decel. I don’t notice any leaks in my exhaust or anything.

I will say however I have about 75-80 hours and have never done the exhaust packing, so I’m thinking maybe it was just coincidence and the packing finally let go? What yall think?