It is so annoying, it makes me type the command as a chat message instead of executing the command

These are the 2 steps for a example of the bug

/execute [SELECT A TARGET SELECTOR BY PRESSING LEFT OR RIGHT ON D-PAD AFTER BACKING OUT OF KEYBOARD ON SCREEN] 

 After auto completing press space and type ~~~ after auto fill. You should see what it shows below.

 ~~~/execute [TARGET SELECTOR] 

Below is what it should look like

/execute [TARGET SELECTOR] ~~~

The only solution for now is to backspace then retype the letter you deleted to stay were you are at.