Buttons won’t properly work

I had my 530 for already few months and I have to say that I liked it at first but my experience on the long run is not the best.

I use the edge remote to change pages so I don’t really use often the buttons on the 530,but when I do it’s troubles,clicking the up or down button most of the times bring me back to the previous page. It’s very uncomfortable when I try to select a course or just to browse on the garmin settings. The weird thing is that it doesn’t always act weird,so I tried to be cool and hope for a software fix. But so far I’m still having the same sudden issues,what should I do? I don’t want to keep a faulty device.