(possible) regression in spice 0.15
I just saw this bug 2007363 in Fedora of VM that was working on Fedora 33 host but stopped working on Fedora 35 host. QEMU throws qxl_send_events: spice-server bug: guest stopped, ignoring.
It was pointed out the archlinux 71473 that shows the same log but only with latest Spice server and downgrading to 0.14.3 solved the problem.
I'll be upgrading to Fedora 35 this morning and I'll try to reproduce. Opening this bug to track/discuss it.