Do watch it if you have not seen it.
Both Sheffield defenders appeal for offside and the lino flags.
The player that has come back from an offside position flicks header into the path of Shelvey who is onside runs on to slot past a goalkeeper who has stopped playing.

You see these offsides coming back from an offside position given every single week.
I'm very keen to know what the actual rule is.
GOAl or No Goal?????

For me the player that flicked on WAS offside when the ball was played forward.

Game is in a mess.