odd bhyve guest message (Khelp module "ertt" can't unload)

I'm seeing this message on exit from a 14.0-RC1 guest on a host
running main-n265915 when it exits normally (via poweroff within
the guest):

pflog0: promiscuous mode disabled
Waiting (max 60 seconds) for system process `vnlru' to stop... done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining... 0 0 0 0 done
All buffers synced.
GEOM_ELI: Device vtbd0p2.eli destroyed.
GEOM_ELI: Detached vtbd0p2.eli on last close.
Uptime: 7h26m6s
GEOM_ELI: Device vtbd0p3.eli destroyed.
GEOM_ELI: Detached vtbd0p3.eli on last close.

Khelp module "ertt" can't unload until its refcount drops from 18 to 0.

acpi0: Powering system off

Not sure it's indicative of a problem
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