This is common and Rippetoe addresses it in PPST. The first line of attack is to drop the weight to 90% on the lifts that you miss and continue with LP. If you are adding ten on the squat, only add five. If you are adding five, only add 2.5 (you can buy micro plates on Amazon).
Also, if I am not mistaken, A is DL and B is PC with DL 1x5 and PC 5x3. Chins are an addition to the basic workouts.
If you reduce by ten percent and start with LP, you can include backoff sets to get more volume and some momentum heading into the sticking point.
I was around the same weights you are now when I got stuck. Then I got hurt and switched to 5/3/1, but I regret it. I’m reading PPST right now and am in the chapters on programming. If you continue to be stuck, you can go heavy Monday, light Wednesday, and add five on Friday for one set of five instead of three. In other words, there are ways to stay on LP if you want to, maybe not daily, but still LP to milk the novice effect for as long as possible.