QPR's second string were narrowly beaten 3-2 away at Palace on Wednesday night.
Rangers Reserves came back from two goals down with goals from Balanta and a superb free kick from Hogan Ephraim. But Abnett got the all important winner for the Eagles with a deflected shot past the stranded, Reece Crowther.
Rangers Reserves are next in action at home to Lewes on Tuesday 14th October, kick off 2pm
QPR Reserve Home matches are played at Loftus Road Stadium. Kick off 2.00pm.