I think it is an IFF.
Fair fly ball? Yeah. Easy.
Can an infielder catch it with ordinary effort? At worst, this is a close call. But Kozma, the shortstop never really turned his back to the plate, nor did he look to be running full-boar. He was able to kinda drift back, and appeared to camp under the ball for a second. Ask yourself this. If he had stayed put and tried to catch it, and the ball had hit his palm and gone to the ground, would you have called it an error? I think you would have. I see ordinary effort here.
The timing on the call is not required as the announcers said. The best mechanic is for the umpires to make the call as soon as it is apparent that the infielder can make that catch. To me, that is as soon as the fielder "camps", which in this case was less than a second or so before the ball hit the ground.
Folks are mentioning that the LF ump made the call and not the infield umps.....so what? The LF ump had the stones to make the proper call by the book. Maybe it didnt look like an infield fly, but by definition I think it was. At the very worst, it was close. If anything, the IF umps spaced it because it didnt look like a typical IFF.
Was it a close judgment call? Perhaps. But this was no crazy miscarriage of justice. I would lean heavily toward saying that it was the right call by all means.