Not ideal, but it’s not bad either. You’re making progress.
How does failure look like for you? Do you fail in the sense that you drop the bar on the safeties, or do you complete part of the set and rack when you think you can’t do another?
How is your progress on T2 squats? If that’s still going up, I wouldn’t be too worried about T1 stalling.
I just checked, and the program also prescribes switching up the set/rep scheme when you fail. Have you done that?
You didn’t say anything about your sleep and diet, but I want to reiterate that they’re both very important. They have a huge effect on your recovery, and how well you recover is one of the main factors in determining how much stronger you get. Make sure you get enough quality sleep. Make sure you’re getting enough protein. But of course, not all is lost if you can’t improve here. It just means you’ll have to live with slower gains at the gym. Slower progression, and more frequent deloads.
I took a screenshot at the bottom of one of your reps. Parallel means the hip crease going below the top of your knee. I’ve circled both here. It doesn’t look parallel to me, but maybe that’s just the camera angle.