There are two possibilities: either you are doing more than you can handle and not recovering properly, or you are not doing enough.
On the days that you did 220x3 and 220x2, did you come into the gym feeling sore from the last session? Were you just tired from other factors? I’m assuming you squatted first, so how did that go? Were you exhausted after squatting?
You said that you are benching twice a week and doing OHP once, but what is your setup? Wednesday is supposed to be a recovery day, if you are going for OHP PR’s then it’s no surprise if your bench sucks two days later. Are you doing any other upper body work in addition to bench and OHP?
I see no reason to do rack lockouts.
Well, you said your squat and deadlift are going up, right? Deloading now and then is usually a good idea, but squat and deadlift are much more fatiguing than bench so if those are doing well then deloading is not really necessary.