Long shutdown time on certain themes - 35sp - pixie patch 2

I’ve noticed some considerably longer shutdown times upwards of 1.5 minute after installing pixie patch 2, where as pre patch at most it would be 30 seconds.
This, reliably, only ever happens on certain themes (c64, muOS98, coffee.time, and a couple others that I don’t remember at the moment) which leads me to believe it isn’t due to having random theme on boot turned on.

After some testing it seems to be related to themes that have navigation sounds but isn’t fixed by turning them off.
Using verbose messages doesn’t show me anything unless it’s a reboot and for some reason those aren’t affected.

Please mention any details I missed that could help.