sent proposed fix to ML:
Fixed SPICE in current spice-gtk builds (spice-gtk 0.20), still happening with VNC according to the cloned bug, moving there.
Equiv fix to SPICE added to GTK-VNC
Author: Daniel P. Berrange <email@example.com>
Date: Wed Jan 29 17:09:03 2014 +0000
Release held keys upon grab_notify event
gtk may propagate some press event up to the Spice display widget, but
a widget may take focus and grab the release event, so the guest will
keep seeing the key pressed.
Releasing the keys when the grab is taken solves two menu-related bugs:
This is based on a spice-gtk fix:
Signed-off-by: Daniel P. Berrange <firstname.lastname@example.org>
This request was not resolved in Red Hat Enterprise Linux 7.0.
Contact your manager or support representative in case you need
to escalate this bug.
This bug was accidentally moved from POST to MODIFIED via an error in automation, please see email@example.com with any questions
Verified in RHEL-7.4-20170421.1.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.