The Baggies had further opportunities after the game restarted. A quick, flowing move ended with Maja poking past the post before both Nat Phillips and Charlie Taylor headed crosses over. Isaac Price diverted a finish wide, too.
Against the run of play, though, Charlton equalised via Dykes – who went through and slotted under O’Leary 20 minutes from full-time.
Mowatt and substitute Jamaldeen Jimoh-Aloba went close late on, but a winner didn’t arrive and it ended level.
Albion: O’Leary, Campbell (Imray 84), Phillips, Taylor, Styles, Diakite (Wallace 74), Mowatt, Molumby, Price (Jimoh-Aloba), Maja (Heggebø 65), Johnston.
Substitutes: Wallis, Bielik, Gilchrist, Bostock, Dike.
Attendance: 20,847 (826).