Medicinal flavor in mead and braggot

My last three experiments with fermenting honey have all resulted in a kind of medicinal, almost minty flavor and I can’t figure out what’s causing it. I used different yeasts for all of them (Red Star Premier Curvee, Red Star Côte des Blancs and White Labs Champagne), each resulting with the same off flavor, to varying degrees. The Red Star yeasts were used in mead recipes, and the champagne for a braggot.

I’ve used the same supplier of wildflower honey for each batch. Anybody had this problem?