When your role is, seemingly, to pick holes in refereeing decisions with the aim of intimidating them into making (more) favourable decisions in future matches, it's very difficult to accept that this position should exist.
That's not what I saw. Vissa had both arms round Dunk and was pulling him back. Dunk grabbed his shirt and pulled/shoved him out of the way but Vissa grabbed him round the waist again. He was not blocking withhis arms outstretched. He was holding round the waist with both arms.
Wissa was behind him holding his waist. He wasn't blocking, he was pulling him back. Dunk turned, grabbed his shirt and pulled/thrust him away but he immediately grabbed Dunk by the waist again. It's a penalty (and a yellow card).
Wissa had hold of Dunk's waist and was pulling him back so he couldnt attack the cross. That's a foul. Dunk grabs his shirt and pulls him away but he immediately latches on again and pulls him to the ground. It's a penalty.