DDJ Rev 5 cue buttons not working with Rekordbox (fine with Serato)

I've been using my DDJ Rev 5 with Serato Pro (no issues) but for some reason, the cue headphone buttons don't seem to work the same with Rekordbox. If I select either chan 1 or 2 (with the mix knob turned all the way over to cue) I can still hear the other channel coming through my headphones. There's a very slight volume difference between the two channels only depending on which cue button I select, but it's making mixing with Rekordbox very tricky. When I use Serato I have no issues at all. If I select Chanel 1 that's all I hear (and the same with chan 2) unless I turn the mix dial - perfect! Do I give up with Rekordbox or is there a fix for this? (Latest drivers/software)