I haven't seen it in any other apps running on graphene, and the search engines haven't yielded a related issue specific to graphene but I haven't searched graphenes tickets yet
Discussion
It's the same with me. The issue is just in amethyst. Every thing else is great here on Amethyst.
It's definitely graphene's keyboard. There is a longer discussion here: https://github.com/vitorpamplona/amethyst/issues/154
Thank you Vitor!