yes it does just like on the stock original firmware. if you notice that you're keyboard stays lit even if you close the slide, or if you see that you're phone automatically unlocks your screen(which is very annoying especially when it's in your pocket), and ofcourse even in phone mode does not go into portrait mode, my best bet would be you lost the magnet on which the slide sensor see if the slide is closed or open, or the sensor itself is broken. if you're lucky you might just be dealing with dust pileup between the sensor and the magnet. me not so lucky i tried cleaning the sensor and the magnet but to no avail. you can try to check it if you can open your phone. and yeah, it also sucks the life out of your batteries since the keyboars stays lit and your display always open once in while..