* Ensure priority updates are determined by current level, not deferred level
Deferral could cause an infinite loop to occur.
Also, re-add the light engine priority logic.
* Rebase
Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
Mojang made some changes to priorities in 1.17 and it seems that these changes
conflict with the changes made in this patch, which in some cases appears to
cause excessive rescheduling of tasks.
This, however, is not confirmed as such but seems to be the behavior that we're
seeing to cause this issue, if mojang has adopted the changes we suggested,
then a good chunk of this patch may be unneeded, but, this needs a much better
look than I'm currently able to do
