One lift plateau

[Spectrum58]

I understand that plateaus happen. However I am getting increasingly frustrated with my bench. All other lifts (squat, deadlift, press) are continuing to progress while my bench remains stagnant (if not regressing). I have tried changing my workout, switching up training days, adding differnet exercises. But nothing seems to be helping it along. Looking for what else could be causing this or what else I can try.

A few notes on reasons that likely contributed to this:
- went from body weight of 248 to 212 over the past 6 months
- had some rotator cuff pain that has since been corrected

I lost weight because I started eating a lot cleaner. I was overweight and wanted to get to a healthier weight. I didn't do any crazy diet, simply cut out junkfood, increased protein intake, decreased carb and fat intake. I lost the weight gradually over the 6 months. I understand that with weight loss often comes muscle loss. However, why are my other lifts progressing while by bench is regressing?