I'd say it is a foul mate - he does catch Jota's ankle.
At worst, it's a booking, though, and moving the fk forward just adds further fume.
That being said, Pickford could have done better and ultimately it's Jags' sloppiness that has cost us.
Perfect challenge. Ball was cleanly won. Farcical decision. Not one person in the ground expected a red card. And yeah, if he can't work out where an alleged offence takes place then it's little surprise he makes awful decisions.