I can confirm this issue. But if I hit the "Page next" key for example, everything goes back to normal.
And also, installing 'vim' fixed the problem. ** Changed in: vim (Ubuntu) Status: Unconfirmed => Confirmed -- [edgy] some keys are not well interpreted in insert mode https://launchpad.net/bugs/63419 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs