Since my last phone update swiftkey misses about every second key input. The mobile does vibrate and the letter flashes on the keyboard as it is supposed to do, yet it doesn't show up in the text field.
I don't always have this error, it works fine for a couple of days, but doesn't go away until I deactivated swiftkey and waited a couple of hours, once it showed up. The timing seems to be random.
I am using swiftkey 184.108.40.206on a Nubia n1 nx541j with android 6.0
A reinstall didn't solve this issue.