Comment 93 for bug 1244090

(In reply to Maksim Kachur from comment #11)
> Similar to this bug (and maybe the same) for me on Gentoo Linux. GNOME 3.16.
>
> In nautilus when trying to rename file and switching the keyboard layout it
> looses focus, changes name to original and I must start from scratch.
> In firefox on some websites there are fields critical to focus loss. Some
> unpredictable things occur.
> Geany/Gedit/other text editors - unpredictable behaviour.
> Bitwig Studio: I can't use some shortcuts, can't switch keyboard layout in
> text fields normally, can't type lower/upper letters without using Caps Lock.
> Lightworks: various problems with shortcuts related to this.

As mentioned in comment #3, this can not be fixed in X. This is how X grabs work.

So, the only hope is what Wayland will be by default someday. Because this bug can not be reproduced in GNOME Wayland session.