If I open a Terminal window and I type the letter "e" (without quotes of course) it beeps and will not type the letter. Every other letter works just fine in Terminal. Uppercase E works too. Just the lowercase e doesn't.
In every other app on my computer lowercase e works without issue, so it's not a keyboard issue.
This started sometime in the last week. I use Terminal a lot in my job and never has this been an issue. I have rebooted (did not fix). I have reset terminal (did not fix).
Since I do not know the exact date when this started, I am not sure if I made any changes or installed software. I am trying to remove anything I have installed recently.
FYI I have tried to use the 3rd party iTerm2 and it does the same thing.
ALSO - if I paste in something with a lower e, it does same thing - will not take it. It has to be some terminal bash config issue I would think.
In fact, I copied the following sense and then I pasted it in Terminal. What appears? sns and you can hear two beeps.
Also - in case it is unclear - this happens with the built-in keyboard on the MBP as well as an external keyboard. Based on that and the pasting issue, I do not think this is a physical keyboard issue in any way.
Specs: 2015 MacBook Pro, fully up to date OS X