Configure two F24 VMs with spice gl support. Start one VM in virt-manager, log in, verify it's working. Leave the window open, start VM number 2, log in, verify it's working.
The still open VM number 1 display is now totally responsive; the last display image is stuck on screen. Resize the window and observe the graphical tearing.
If you close both VM windows, the next VM that is opened will work fine, VM 1 or VM 2. However open the other, and the first one goes dead again.
Note having 1 VM open in virt-manager and 1 VM open in virt-viewer works completely fine... so maybe this is some collision within a single process.
Tested both F24 spice-gtk version, and spice-gtk git
sent patches to ML (3-7);
Nice turnaround time!
These patches are in 0.32 which has been in f24 for a while