Ok, so this has been bugging me for a while. Many times, with stale but not totally oxidized beer (it doesn't taste like cardboard or sherry yet) I get a definite banana flavor.
I find it's more common in pale lagers, but I do get the same thing from some ales, SNPA being a definite one.
Anyone else ever get this? Or am I just mis-identifying another flavor? We aren't talking Weißbier levels of banana, just kinda enough to know it's there.