ToME: the Tales of Maj'Eyal

So I've seen this happen with DoctorNull's class pack (but only when I enabled the new classes on enemies) and now I'm seeing it on another run with addon classes (specifically the bloodruned dwarf from the Inferno Race Pack as a Chrono Ranger from the Hybrid Class Pack). It's happened twice now on this character.

I'll go down a set of stairs, there's a Lua error, and I don't "exist" - it appears that the player character does not spawn into the level properly and turns pass rapidly without me being there (the calendar ticks forward, if it happens in Sandworm lair the worms move around, etc...). Using the rod of recall has no effect, the timer starts and goes nowhere.

The only solution is to have a mod return the character to starting point, which sometimes results in odd behavior from the game.

Anyone aware of what causes this issue or had any similar experiences?

Lua Error is here:

ERROR:
Game version: tome-1.7.2
Addons: ejhybrids-1.4.6[X!], hz-escorts-1.3.1[X!], items-vault-1.7.0[O], possessors-1.7.0[O], infernoracepack-1.4.0[X!], ashes-urhrok-1.7.0[O], angeluserrare-1.4.6[X!], better_item_desc-1.7.2[X], orcs-1.7.0[O], zomnibus-1.7.0[X], cults-1.7.0[O]

Game version (character creation): tome-1.7.2
Lua Error: /data-infernoracepack/talents/dwarf.lua:78: attempt to call field 'CDreduce' (a nil value)
At [C]:-1 CDreduce
At /data-infernoracepack/talents/dwarf.lua:78 passives
At /engine/interface/ActorTalents.lua:624 learnTalent
At /mod/class/Actor.lua:5066 learnTalent
At /mod/addons/orcs/superload/mod/class/Actor.lua:213 learnTalent
At /mod/class/Actor.lua:3881 resolveLevelTalents
At /mod/class/Actor.lua:3914 levelup
At /mod/addons/orcs/superload/mod/class/Actor.lua:128 levelup
At /engine/interface/ActorLevel.lua:145 forceLevelup
At /engine/interface/ActorLevel.lua:63 resolveLevel
At /engine/Entity.lua:782 resolve
At /mod/class/Actor.lua:320 resolve
At /engine/Zone.lua:735 finishEntity
At /engine/Zone.lua:454 makeEntity
At /data/general/events/glowing-chest.lua:48 f
At /mod/class/GameState.lua:3166 afternicer
At /mod/class/Game.lua:1185 changeLevelReal
At /mod/addons/cults/superload/mod/class/Game.lua:45 changeLevelReal
At /mod/class/Game.lua:956 base_changeLevel
At /mod/addons/zomnibus/superload/mod/class/Game.lua:112 changeLevel
At /mod/class/Game.lua:2252
At /engine/KeyBind.lua:243

You're probably (read: definitely) using mods that haven't been updated for 1.7. In fact, Nullpack wasn't even updated for 1.6 AFAIK.

Major updates often break mods.