I apologize if this has been addressed already but I was having difficulty coming up with the right keywords to try and find an existing topic.
So this is something I keep seeing happen with landings. The localizer will initiate its capture, but then the aircraft will keep over correcting when trying to line up with the runway on final. The resulting behavior is the aircraft will continuously turn left, then turn right, then left again, then right again - the entire final. I have to disengage the AP and manually fly the landing, which I usually do anyway once I’m fully established on the glide slope. Usually I stay at 180 knots until 2500 feet and then I drop the gear and slow to final landing speed. It does this in any aircraft, a350, 777, CRJ to name a few. Is there something I’m missing?