While connected to remote VM user is able to choose a desired screen resolution from the range of supported resolutions. But, selected higher resolution doesn't persist.

# rpm -qa | grep -E 'agent|qxl'
ovirt-guest-agent-common-1.0.13-5.el7ev.noarch
spice-vdagent-0.14.0-14.el7.x86_64
qemu-guest-agent-2.8.0-2.el7.x86_64
xorg-x11-drv-qxl-0.1.5-3.el7.x86_64

This bug doesn't depend on client. It is reproducible with:

virt-viewer-2.0-12.el7.x86_64 and spice-client-msi-x86-4.1-6.el7ev.noarch

How reproducible: always

Steps to Reproduce:
1. Login to User/Admin RHV WebPortal .
2. Have a running RHEL VM.
3. Connect to remote virtual desktop in window mode. 
4. With help of a mouse resize remote viwer window to some smaller dimension. Say, 1024x768 (roughly).  
4. Open terminal in the client.
5. Type xrandr and check current mode.
6. Type xrandr --output Virtual-0 --mode 1920x1200
7. Type xrandr to check a new resolution.

Actual results: In my case a new resolution is: 1598x769      59.95*+

Expected results: Guest must have new resolution 1920x1200

Additional info: 

1. Step #4 is very important.
2. The same is true if you change guest resolution with help of Gnome settings.