How to fix this accented letter issue?

Using Impress right now, on my Kubuntu 14.10 desktop. After a while, if I type “ALT+’ e”, instead of “é”, I’m getting “'e”. If I close and reopen it works for a while. Same thing if I get out/get in the edit mode: it works fine for some time. On my laptop (same OS, same LO version), all is good. Any clue what might me going on? Thanks!

I would reset my user profile. For details please refer to: