Keyboard sticks after sending texts

[AC Question]

After I text someone either on text app (the convencional one on Samsungs) or on the facebook messenger and after that I leave the app (pressing the middle button) my keyboard still appears on the screen for about 10 seconds...
This only occurs when I send the message if I dont send it, this problems doesn't occurs...
I have an Samsung Galaxy S7 (already with the android latest version)
I've tried to clean both apps. I uninstalled the facebook messenger. I turned off the phone, I restarted it, I've cleaned all the text messages, I've reseted all settings of the keyboard. And nothing works....
Please help
Thanks

 

[B. Diddy]

Welcome to Android Central! Try wiping the cache partition: https://support.t-mobile.com/docs/DOC-24999