two days ago I noticed my guitar making a strange noise when plucking certain strings on certain frets. Watching the issue more closely, I realized that it only happens when I play a C anywhere (e.g. low E8, low E20, A15, D10, D22, G17 [notation?]). The effect seems to be stronger on higher frets and doesn't seem to occur on the B or high E strings at all. The sound seems to be coming from the bridge. It is definitely not a fret buzzing.
Here's a recording of the noise: https://voca.ro/1dlq268wqzd6
Here's what my bridge looks like: https://i.stack.imgur.com/GOebF.jpg
The guitar in question is a PRS SE Standard 24 that I got a few weeks ago. The only thing I messed with in the past few days was the intonation, since it seemed to be a bit off. As far as I know, the noise only started happening afterwards. I don't really understand why it doesn't seem to happen on the higher strings, maybe it has something to do with string gauge. Since the noise started, I tried tightening some of the screws on the bridge since a few of them seemed to be looser than the rest but it didn't seem to help.
Edit: I opened up the backside and played around with the two screws holding the plate that the springs are fixed to. It seems like they weren't quite symmetrical, the noise appeared to lessen when I tightened one screw over the other. It seems like my problem is fixed for now, but can anyone explain to me what was going wrong here?
Edit 2: Seems like I haven't quite fixed it. Playing around with those screws seems to do something, but I haven't quite found the sweet spot. It's trial and error at this point.