Same here. PHL is my primary airport (once or twice a month) and earlier this month was the first time I had an issue with my spinner (bag itself is 21 in but with wheels it does measure at just over 22 inches in height); same bag I've used on a voluminous amount of flights over the past few years. Same bag that fits effortlessly in the overhead space.

Was in line for terminal B pre-check when my bag was snatched out of my hands to measure, deeming it too big and had to be checked. I thought at first she meant too wide, maybe thinking it was expanded, which I knew it wasn't and was prepared to remove stuff out of it just to help, but that wasn't the issue she snapped, it was too tall (she measured it wheels down, never measured sideways). It's been placed in the sizer before with no issues, but not this time. She wouldn't let me proceed. I was very confused and embarrassed by the tone she took with me, and pretty annoyed quite frankly when she physically took my bag out of my hands to wheel it over the the sizer. I did go out and purchase a slightly smaller bag, just to avoid the harassment.

I asked my bro about this (he's PHL TSA), and he says they hear a lot of complaints about this contracting entity; unfortunately for TSA, it's the airlines, not TSA, who dictate and enforce bag size. This is a complaint TSA can't address even if they could or wanted to (they have enough problems, let's face it).

This contracting entity is way too aggressive and downright rude. AA should take notice, if their reputation is of any concern.