Albion slipped to a fourth successive loss in Premier League 2 after two second-half goals condemned them to a 2-0 defeat against Crystal Palace on Monday.
It was a frustrating afternoon for the under-23s, who created several chances but were punished for two bad defensive errors by Jes Rak-Sayki.
Cam Peupion hit the post when Albion were 1-0 down but they conceded again deep into stoppage time and stay tenth in the Premier League 2 table.
A strong Albion side won two corners inside the first couple of minutes, setting the tone for a dominant first-half performance by the visitors.
They should have been in front at the break after creating several chances. Todd Miller curled an early effort wide and forced a great save from goalkeeper Joe Whitworth after latching onto James Furlong’s pass and getting between two defenders.
Evan Ferguson found the side netting when Peupion beat the offside trap to set up the chance, Jack Spong fired over from a good position and Ferguson latched onto a quickly taken throw-in but couldn’t get his shot from an angle on target.
Palace rarely threatened but Tom McGill had to be alert to keep out Rak-Sakyi’s shot on the half-hour.
The second half was more even but Whitworth tipped over Peupion’s shot before play was held up for several minutes when John-Kymani Gordon and Malachi Boateng clashed heads and came off after lengthy treatment.
Because of concussion protocols, it meant Palace now had four substitutes on the pitch. It seemed to energise them but their 76th minute breakthrough came after a bad mistake by McGill, who was dispossessed by David Omilabu and Rak-Sayki gratefully fired into an empty net from eight yards.
Albion had a great chance to equalise nine minutes later. Moises Caicedo’s pass found Odel Offiah on the right. He picked out Peupion who beat Whitworth but saw his drive come back off the post.
It wasn’t Albion’s day and in the sixth of 11 added minutes the home side sealed their victory. Haydon Roberts was dispossessed inside the six-yard box and Rak-Sayki had another easy finish for his second.
Albion: McGill, Offiah, Turns, Roberts, Furlong, Leonard, Caicedo, Spong, Miller (Ella 82), Peupion, Ferguson.
Subs not used: Beadle, Tanimowo, Hinchy, Dendoncker.