Conflict with FB messenger emojis

When replying to a message on FB messenger, if I tap the "add emoji" symbol while using SwiftKey beta I get "Samsung keyboard has just stopped" (which in itself is odd since I'm not using it) and then every time I try to use they keyboard I get the same message. Since the most recent Samsung update (end August 2017) it is even worse becauss can't access settings>input>virtual keyboard in order to reset the keyboard to swiftkey, and if I restart, the keyboard hangs silently and I can't even enter my password to unlock the lock screen! I have to start in emergency mode (which disables swiftkey) enter the password using the samsung keyboard and then restart AGAIN.