Yes, and the haptick feedback was one of the settings that it changed, now u need that app to undo it before removing it.
U must have removed the app while it was still set on optimizing battery.
Just reinstall it, click the optimization again and after a few minutes disable the optimization from the app itself. Then you can safely remove it.
It happens sometimes that the apps affect the changes in the system which are not controlled by the general settings. Try this, you don't have anything to lose anyways, your vibration won't come back by itself
Samsung GT-S5830 Galaxy Ace
ROM: AOKP 4.2.2
Scripts: CronMod INT2EXT4+
245MHz - 800MHz, SmartassH3