I recently gotten a Sire V5R, theres been some buzz/rattling (even when its not touching the fret). When I pluck with my thumb on the Open A it makes a really loud rattle noise. No other string makes that noise. I was wondering if any one else had a similar issue like this.

I haven't done a major setup. But I've made a major trussrod adjustment, and bridge action is 3mm-2mm. The nut might also be a little high, it might need filing.