From
NFL Gamepass (Starting at about 51 minutes - not the original play, but when they finally go back and look at the replay):
You can see the flag lying just to the left of the 50 and maybe two yards in bounds - as Ford is making the strip.
Now when was it thrown?
Here's where the side judge was reaching for the flag:
Not quite instantaneous but pretty close.
And here's the side judge nonchalantly flinging it out it almost straight to his right. Is that standard?
From the way the side judge is acting I'd say he got tricked by Ford's amazing first step and jumping on the snap count - and thought Ford jumped. He didn't seem to be completely prepared to throw the flag as soon as the ball was snapped.