I just bought a Keen Zionic Jasper shoes which is a suede leather city/light hiking shoe from Keen. I have wide foot and narrow heel so it was nice to find shoes that I can wear that doesn't cause heel slippage. The fit in the toebox, mid area of the shoes are fine but on my left foot, the tongue part of the shoe always seems to be digging into my instep no matter how I adjust the lacing, if I loosen it too much the shoe slips in the heel. My right foot is actually the dominant bigger foot so it's so weird to me that it's the left one that feels tight in the tongue part. Is it possible that the instep of my left foot is higher than my right one? The other theory I have is that maybe the shoes (which is size 8) might be actually big for me and I have to lace my left foot (which is the smaller foot) tighter to keep the shoe from slipping. I'm usually a size 7/24.5 cm but the Keen shoes are size 8/25 cm. I'm also wondering if it's the material? It's actually my first time to buy a suede leather hiking shoe. Or do I need time to break them in and soften the material?