When using multiple displays any non-"GPU Supported" display flash constantly

**Describe the issue**
My setup has both the laptop screen and an external monitor and I'd like to use both in the VM (with a Linux guest).
Both screens show up in the VM, but the display that is emulating a display card without GPU support (which is required, Qemu seems to only support 1 GPU supported display at a time) is _constantly_ flashing. It's _very_ distracting. This seems to only happen when the mouse cursor is moving on that screen, if it's still or present on the other screen it doesn't flash at all.

**Configuration**
* UTM Version: 4.4.5, from Homebrew
* macOS Version: Sonoma 14.2
* Mac Chip (Intel, M1, ...): M3

**Debug log**
[alpinelinuxvm-log.log](https://github.com/utmapp/UTM/files/14298237/alpinelinuxvm-log.log)

**Upload VM**
[config.plist.zip](https://github.com/utmapp/UTM/files/14298250/config.plist.zip)