GMS Unleashed - bugs and problems

Wow that sucks. So it seems stupid to spend NX on that lol. Why spend money on it when it causes more problems?

Because most people prefer to half-die rather than completely die?
Usually they don't want to get sent to town (or out of the boss room), or lose their buffs (in the case of a boss with revive in the same map), and are happy it's only the death count or exp that got lost.
Of course, if you set your HP threshhold too low, and keep dying, and the Potion Pot keeps reviving you, and you fail to pay attention, you could lose a lot of exp before you realize what's going on.

Note that you can still fully die, tombstone and all, even with a Potion Pot.

Also, I find it very annoying that you can't keep tabs on the potion pot like on the potions in your inventory. Can't just put it on a hotkey and glance at it to know whether it's running low. You have to hover your mouse over it. That was a major stressor for me at Ancient Mixed Golems. (Those things cost me 5m HP an hour)