When we turn up the kitchen sink water (hot or cold), around 75-80% full, the water starts getting choppy and the faucet head starts bouncing up and down. At lower flow levels, there's no issue. The hot water seems to take a little longer to hit that state than the cold water.
We have one of those PUR water filters attached, and I noticed that there was no issue with the filter switched on (although that might be just due to low overall throughput) so I tried taking the filter off. No choppiness or bouncing, but it sounds funny, almost like too much air is getting in, and a few seconds after I shut it off, I get a second gush of water. This might be due to a lack of aerator (said aerator being built into the filter), I guess, but I'm adding what data I can.
This happened after our backyard neighbor (a bit downhill) started getting water coming out of their yard yesterday, although our problem only started around 4 PM today. There are no other reported issues were can find online for our area.