To get all new features and bug fixes the novnc package should be upgraded to 0.5.1-2
Verified on 3.6.0-15 build
# rpm -q novnc rhevm-setup
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.