Buggy. Keyboard wont show up half of the time

When it works, its nice but the keyboard either revert back to the regular iOS keyboard or no keyboard shows up at all. This keyboard app has been having this problem ever since the very first version. Why cant the developer focus on fixing this bug instead of pumping out other useless features? Whats the point of those new features when the keyboard doesnt show up half of the time?

Light.wave about Microsoft SwiftKey AI Keyboard, v1.4.8