Moyes has garnered more than enough experience in his almost 24 years in the dugout to know sentiment counts for nothing and his side had to come from a goal down in Belgium
Benrahma fired in from Vladimir Coufal’s smart pull-back to level after the break and then added a delightful individual effort nine minutes from time to seemingly wrap up a win.
But Soucek inadvertently turned a cross into his own net with three minutes left to mean they will have to wait to confirm qualification.
The Hammers had paid for a slow start at Cegeka Arena, with Joseph Paintsil darting onto Junya Ito’s pass and goalkeeper Alphonse Areola unable to keep out the forward’s low strike.
Moyes’ side sit top of Group H on 10 points with two games to play.