The Twisted and Twilight Update (hotfix 1)

 is a mini-patch which was released on January 26, 2021. It followed The Twisted and Twilight Update.

Patch notes
https://www.totalwar.com/blog/the-twisted-the-twilight-update/

BUG FIXES

 * Recruiting Ariel will no longer cause a desync in multiplayer campaigns if one player does not own The Twisted & The Twilight
 * Forest Health now provides scaling diplomacy benefits, with each Forest affecting a different culture
 * Bonus decrease behaviour of Wood Elves’ teleportation cooldown is more consistent when it is applied to active cooldown
 * Durthu’s starting battle in Mortal Empires now correctly loads an Athel Loren forest map and not a Lustria jungle map
 * Added additional Victory Objectives for Throt the Unclean in the Eye of the Vortex campaign
 * Norscan factions in the Vortex Campaign are now able to form trade agreements with other factions
 * Buildings in the building browser will now only show enabled recruitment of units that your faction has access to
 * The unit disband menu in the Flesh Lab is no longer lost when switching between armies
 * Units in Skaven separatist armies now show the augments symbol on their unit card if they have any
 * Intervention armies will now focus on ritual sites correctly
 * Mutant Rat Ogres now have a chance to not be knocked back, increasing their combat performance
 * Malevolent Branchwraith (Beasts) will now cast Amber Spear