Nigel Pearson has bemoaned the two key decisions that went against his side but admitted he feels frustrated having failed to hang onto another lead.
The Robins went ahead for the third time in the league this season when Andi Weimann made it four goals in four matches having latched onto Tommy Conway's cross after just six minutes.
However, the opening 45 minutes came down to two major talking points. The first came when Conway was denied a penalty when he was bundled down in the box after bearing down on goal before Joe Bennett arguably should have seen a red card when he kicked out at midfielder Joe Williams.