Luke 22:19-21
And He took bread and gave thanks, and He broke it and gave it to them, saying, This is My body which is given for you, this do in remembrance of Me. In the same way He took the cup, after having dined, saying, This cup is the new covenant in My blood, which is being poured out for YOU. But, behold, the hand of My betrayer is with Me on the table"
That betrayeth (tou paradidontos). Present active participle, actually engaged in doing it. The hand of Judas was resting on the table at the moment. It should be noted that Luke narrates the institution of the Lord’s Supper before the exposure of Judas as the traitor while Mark and Matthew reverse this order. (A T Robertson)
From Luke's account it appears most clearly, that Judas was not only at the passover, but at the Lord's supper, since this was said when both were over (John Gill, Reformed)
By placing this after the institution of the Lord's supper, though in Matthew and Mark it is placed before it, it seems plain that Judas did receive the Lord's supper, did eat of that bread and drink of that cup; for, after the solemnity was over, Christ said, Behold, the hand of him that betrayeth me is with me on the table. (Matthew Henry Reformed)
Luke is a first-class historian
Now shows that Judas did not hear the words from Jesus, "My blood, which is being poured out for YOU"; and that he was not part of the Lord's Supper, and took it with the other 11
There is zero contradictions in the Bible, except those created by those who refuse to accept what the Bible Teaches, for the sake of their personal doctrines!