Can't enter the letter 'e' over ssh [duplicate]

Right now I am experiencing some very, very weird behaviour on a Ubuntu 14.04.2 LTS server I am managing.

Connecting to the server over ssh either from cygwin(mintty) or a terminal on a Linux machine, I can't type the letter e.

I have done the following debugging:

• The letter e can be typed in vim on the remote server
• The letter e can be typed in the terminal on the local machines
• $TERM is set to xterm
• $LANG, $LANGUAGE and $LC_ALL are set to de_DE.utf8
• locale charmap returns UTF-8

Right now, I am completely out of ideas what could be causing this.

I'd be very happy about some advice on how to fix this.

My problem is not the same as can't type lower cased e in amazon ec2 (Amazon Linux), but similar.

After checking /etc/inputrc and finding nothing out of the ordinary, I remembered that I did do some keybinding in the /etc/bash.bashrc. This was already there for a very long time and worked flawlessly, though. Why would it make problems now?

I found out when I checked /etc/bash.bashrc:

As all files are managed using ansible, this command had been inserted using ansible as well:

- name: Up Arrow Command Search
  lineinfile: dest=/etc/bash.bashrc line="bind '\"\e[A\"':history-search-backward"

- name: Down Arrow Command Search
  lineinfile: dest=/etc/bash.bashrc line="bind '\"\e[B\"':history-search-forward"

Apparantly, a recent ansible update changed the behaviour of lineinfile, so that the command resulted in

bind \e[A:history-search-backward
bind \e[B:history-search-forward

instead of

bind '"\e[A"':history-search-backward
bind '"\e[B"':history-search-forward

And therefore resulted in the weird behaviour.

A big thanks goes to Eric Renouf, for his link to the other question with the similar problem!