I thought it was penalty as well. Can you share vid once available showing otherwise?
Look, it's very simple, and I think you (a sane person) would get why:
The replay includes two parts: 1) AWB's action, 2) what happens after it
1) AWB's action comprises only the sliding of the leg, which takes x number of seconds.
If during that sliding from t=0 to t=x, his sliding leg touches any part of Elliot's body W/O making contact with the ball, then it's a pen
2) If, after the sliding is completed (t=x+ some milliseconds), Elliot continues his run ON any part of AWB's body, that is not an action initiated by AWB
This is exactly what happens in our case, as the vid above shows: after AWB's action ends (leg reaches its end point and lands on the ground) Elliot continues his run, and steps on the body of AWB lying on the ground
Personally I could not care less that people like Serghei don't understand the logic
but the fact that some refs these days (thankfully not all) have come to believe that 2) is something of which the onus is on the defender who completed his action, and not on the attacker who simply bumps into the defender is beyond me
They should correct it ASAP with new directives