I hate to bring this up again, but after rewatching this a few times the stoppage feels more justified. The dude looks like he's about to cry uncle any second, and he did one of those 'fake taps'. Slightly early maybe. But inevitable.
I said the exact same thing when I watched it live, Albert in no way to me looks like he is going to get out of that armbar, A few more seconds and I think he would have tapped she just jumped the gun, shes not the only referee guilty of it.