SwiftKey shows up unexpectedly

Hi, I've been using SwiftKey for years until earlier this year when I updated to the latest version at the time. Everything work fine but the problem appears when I want to open an application which is password protected. The original keyboard for the password show up but when I start to type my pass, SwiftKey show up too. In the end there are 2 keyboards appear. It didn't happen before the update. Here's the screenshot:

Also, when I finish typing my pass, SwiftKey won't hide whatever I do. So I have to open application that really need the keyboard to hide it.