Bug in chat

When I go to the chat and put "/ give @p command_block", it does not let me put the "a" next to the word because the word is deleted and leaves the "a" alone, for example:

As it should be: / give @ p command_ block What you pay / give @p comm (the word is deleted and the letter "a" is left alone)

It also happens to put any word with "a", I think it is a serious error because all the words that you write are deleted.

 That bug is not very comfortable.

 Correct that error or bug please.