Haven’t seen the incident but if Longman and their player contacted the ball simultaneously I think Tom would be onside but if the effort hit their player AFTER it left Longman’s foot then Tom would have been offside when the ball was kicked and the decision would have been correct.
Several decisions have gone Sunderland’s way last season and this. Honeyman’s disallowed goal last season; Clarke not receiving a second yellow card yesterday then winning the penalty (that was not a penalty!) and Tom’s disallowed goal
.
When luck goes against you it makes getting a result increasingly more difficult