R-13M1 missile nerfed after the update?

I remember before the update whenever I used my R-13M1, if my target flared, it would wobble a bit, but still hit their plane. But now, after the “Firebirds”, R-13M1 feels like R-60. Whenever I use it, it’ll go for flares instead, even if my target’s afterburners are on. Looked through the change log but I didn’t see anything regarding missile tweaks. Is it just a skill issue on my part and that this missile has always been this way, or did Gaijin do a sneaky tweaky?

Nothing has changed. The people you are facing likely are better at defeating missiles.