Bluez 5.40 on Ubuntu and 5.38 on CM12.1 phone also laggy. But one detail could help devs to find the bug. While pairing keyboard with PC i see a number, that i have to type on the keyboard to connect it it. So typing that numbers is always very fast and stable, i did try it a lot of times. But once paired, it becomes laggy, buggy, unusable.
Bluez 5.40 on Ubuntu and 5.38 on CM12.1 phone also laggy. But one detail could help devs to find the bug. While pairing keyboard with PC i see a number, that i have to type on the keyboard to connect it it. So typing that numbers is always very fast and stable, i did try it a lot of times. But once paired, it becomes laggy, buggy, unusable.