Not that hard to figure: you don't like Woodford Reserve -- at least, not the version currently bottled. Join the club.
The taste/sense you describe sounds metallic to me. The metal is copper, from those much-extolled copper, pot stills which produce such mediocre whiskey. I note that you say you last poured from this bottle in May, which I additionally note is c. 2 months after you registered here as a member.
Is it possible you bought into the hype of Woodford Reserve when you bought it, but have now sampled/discovered/discussed many other bourbons you really DO like, and now can't remember why you originally found the WR acceptable?
Just askin' ('cause, as you can tell, I ain't no fan of today's Woodford Reserve, however much I enjoyed the Old-Forester-honey-barrels version).