Undead not despawning after Day/Night Change in multiple zones.

[SirGouki]

I have:

• [x] searched existing issues (http://github.com/darkstarproject/darkstar/issues/) to see if the issue I am posting has already been addressed or opened by another contributor
• [x] checked the commit log to see if my issue has been resolved since my server was last updated

Client Version (type /ver in game) : 30191227_0

Source Branch (master/stable) : master (18Jan2020)

Additional Information (Steps to reproduce/Expected behavior) :

Undead mobs do not despawn on Time of Day change to day time regardless of player count of the zones. I have witnessed this in Valkurm Dunes, Ronfaure, and Qufim Island. This is on a server with no major changes made (I've changed aquaveil, signet to add regen/refresh, doubled player stats, and the gil modifer that makes all mobs drop gil in the map config)

Edit: This is not easily reproducible and a few of us have spent all day tracking down what's causing it (22Jan2020)

[TeoTwawki]

I've seen this happen myself for a variety of reasons. I think there is a mixup in west saruta as I saw a nearby non-undead depop instead but that could be a coincidence+navmesh thing (mobs sometimes walk to far and depop themselves). In other cases I think it has to do with the zone "sleeping" when empty, and the depop gets skipped until another day/night cycle (it should simply happen on first tick instead but that did not happen - seen in valkurm).