There's a lot of snatching on Free Now. In general clients just want to get from A to B so if they eHail a cab from a bar, for example, they don't pay a lot of attention to what car is allocated - they're probably in conversation or maybe put their phone away to urinate before leaving or whatever. Hence when they go outside they may or may not ask any of the taxis queued up or dropping off if they've been allocated the job. The best way to avoid such disappointment is not to accept jobs from pubs, transport terminals, etc when you know there's plenty of cars available in those locations.
I had one myself last Sunday evening... It was a dreadfully quiet weekend and I was parked in the layby on Priorswood Rd, Coolock, quite immersed in Willie Carlin's account of his days spying on Sinn Fein in Londonderry when a gentleman approached and asked if I was for no. 112. I advised him that I hadn't been allocated any specific fare but was available for hire. With that he boarded my vehicle and we set off for Dublin City Centre.