Hammer has a Minimum Range
I’ve had the opposite issue with environmental objects. Often I’ll seem like I’m close enough to some destructible quest item but when I swing I miss, forcing me to move in very close. Might just be the windows.
Do you happen to have Melee Attack Assist enabled/disabled from Options?
I do have Melee Attack Assist off but, I was never behind the target. If it was intended that melee attacks miss if your overlapping slightly with the target still in front, then I would say that’s very poorly designed. Melee is already hard enough.
It still wouldn’t make sense in the case of the windows on the clock tower, if this was the case.
Ya, I turned Melee Attack Assist back on and I still get the minimum range issue with the windows on clock tower but, it appears that missing too close players is no longer an issue.