I have noticed that sometimes Melee just wont work, and they it comes back It is so annoying especially in those missions like Terminus and Blackout where you have to conserve ammo and you want to beat those ceph to death.
I'm using the XBOX 360 controller with my PC game. If I have to start from the last saved game, the Melee button doesn't work. I have to completely exit the game and then start it back up from scratch and then Resume my game from there.
It was working fine previously but, previously I wasn't dying as much as I have where I am now. [The Hive]
It appears to be random, sometimes i sneak up on a cell dude from behind and the prompt to stealth kill does not happen, yet other times it does. And i have repeated this many times to confirm it. Or maybe it is supposed to be like that to trick you and catch you out?, i doubt it but whatever, lol.
But thanks for explaining the fix... next time, quit after dying and reload. Until the next patch at least. The game is good enough to accommodate it that way (even if that tank was a ***** to get by).