The winger started the 12th match of his loan spell at the Blues and the most important as Chris Hughton's men attemped to turn around a 1-0 deficit from the first leg of the Championship play-off against Blackpool.
Andros was kept quiet as Blackpool forged into a 2-0 lead on the night and 3-0 on aggregate with goals either side of half-time.
The 20-year-old was substituted in the 62nd minute and the Blues fought back later in the half to 2-2 on the night, but couldn't find the third goal to take the game into extra time.
Blackpool now face West Ham at Wembley for a place in the Premier League on Saturday, May 19.
Reading and Southampton won automatic promotion.