why is my whisky evaporating? - Divisions by zero

I have a heavy crystal decanter I’ve been using for years. A while back I was having some guests for a week, and thought I’d save some money and grabbed a bottle of Jim beam to put in it, as opposed to the higher end I tend to go for, because none of my guest cared about Bourbon. I noticed the level going down further than I had consumed. This has never been an issue before, so I figured someone had just nipped it while o was asleep. The next day, there was condensation on the inside, and the level had dropped further. Since I’d been using the decanter for so long, I assumed the frosting on the stopper had rubbed off and it no longer sealed. When it was empty, I refilled it with larceny, my standard, and to my surprise, it didn’t evaporate at all for weeks. Last night, I refilled it with beam again, and this morning, it had dropped and there was condensation on the side. What really confused me, is Jim beam has a lower alcohol content than the Bourbons I usually fill the decanter with, so I would think it would evaporate as readily. Why does only this one brand evaporate? Quick searching gave me no results Tldr: Why does Jim Beam evaporate in my decanter while nothing else does?