Since the Boston series, we are 24th in run-scoring and 26th in OPS and wRC+. I was going to comment "shades of post-8/11", but that's not really true: after August 11th last year we were middle of the pack on offense. So what we're seeing now is very different from post-8/11. Probably a lot of it's timing: five of those games we won, we scored three or fewer runs, and when we lost, we were frequently blown out (11-4, 7-0, 8-1, 6-1).
I wouldn't say pity the poor Rangers or anything like that, but they've been 28th in run-scoring during the same span (67 vs our 81), but second in run prevention (65 vs our 75), and yet they've gone 8-14 vs our 14-9.