[BUG] - [WFRP4e] - Custom Category not applied on Merchants Population

[Forien]

Are you on the latest version of Item Piles?
Yes

Have you tried to reset Item Piles' system settings?
No

Describe the bug
When populating the Merchant with items from Rolltables, the selected "custom category" is not applied.

However, it seems to sometimes work, so after some testing I noticed that it only works if Add all items is checked, but not if it's unchecked.

To Reproduce
Steps to reproduce the behavior:

1. Open Merchant Sheet
2. Navigate to Populate Items tab
3. Add some Rollable Table
4. Select a category for Add items to custom category
5. Make sure Add all items is not checked
6. Populate the actor
7. Notice the items use their system's type instead

Expected behavior
Items should use custom category even if Add all items is not checked

Screenshots
n/a

Setup:

• Foundry Version: [11.315]
• System Version: [WFRP4e 7.0.3]
• Item Piles Version: [2.8.20]
• Browser & version [Google Chrome 121.0.6167.185]

Active modules:

Module List

Core Version: 11.315

System: wfrp4e 7.0.3 (Moo Man, CatoThe1stElder) 

Modules: 
ATL 0.7.0 (Kandashi, kaelad)
JB2A_DnD5e 0.6.5 (Jules, Ben)
_chatcommands 2.0.2 (Cody Swendrowski, The League of Extraordinary FVTT Developers, Adrian Haberecht)
arms-reach v2.3.3 (Psyny, p4535992)
autoanimations 4.2.71 (Otigon (Otigon#2010))
chat-commander-wfrp4e 0.1.4 (Forien)
custom-css 2.2.2 (zeel, Cody Swendrowski)
darkraven-games-soundscapes-free 1.2.1 ()
dfreds-chat-pins 3.0.0 (DFreds)
dfreds-effects-panel 3.1.1 (DFreds)
dice-so-nice 4.6.10 (Simone, JDW)
forien-actors-summary 0.1.3-beta (Forien)
forien-ammo-swapper 0.3.0 (Forien)
forien-armoury 1.4.1 (Forien)
forien-copy-environment v2.2.0 (Blair McMillan, Forien)
forien-easy-polls 1.0.7 (Forien)
foundryvtt-simple-calendar 2.4.3 (Dean Vigoren (Vigorator))
image-hover 3.0.3 (Eriku)
item-piles 2.8.20 (Wasp)
ivan-duch-music-packs 2.0 (Ivan Duch)
lib-wrapper 1.12.13.0 (Rui Pinheiro)
local-shared-compendiums 1.0.0 ()
michaelghelfi 1.4 ()
moulinette-core 11.7.3 (Sven Werlen)
moulinette-imagesearch 11.0.1 (Sven Werlen)
moulinette-scenes 11.1.5 (Sven Werlen)
moulinette-tiles 11.1.3 ()
multi-token-edit 1.59.1 (Aedif)
permission_viewer 11.5 (Matheus Clemente)
polyglot 2.4.2 (Matheus Clemente)
popout 2.16 (KaKaRoTo, Posnet)
quick-insert 2.8.5 (Sunspots)
remote-highlight-ui 2.0.0 (shemetz)
sequencer 3.1.4 (Wasp)
socketlib 1.0.13 (Manuel Vögele)
soundfxlibrary 1.0.2 (CDeenen)
stairways 0.10.2 (Simon Wörner)
sweetnothings 1.5.0 (Geekswordsman)
tabletop-rpg-music 3.1.0 (Tabletop RPG Music)
times-up 11.1.2 (tposney)
token-action-hud-core 1.5.3 (Larkinabout, Drental, ^ and stick)
token-action-hud-wfrp4e 0.0.13 (Forien)
token-ease 1.2.1 (Wasp, Kerrec Snowmane)
token-variants 4.62.6 (Aedif)
update-your-password 1.1.0 (Richard Robertson)
wall-height 5.1.4 (theripper93, Ian Murphy, Cole Schultz)
wfrp4e-altdorf 4.0.1 (Moo Man, Published by Cubicle 7)
wfrp4e-archives1 4.0.2 (Moo Man, Published by Cubicle 7)
wfrp4e-archives2 4.0.2 (Moo Man, Published by Cubicle 7)
wfrp4e-core 4.0.2 (Moo Man, Published by Cubicle 7)
wfrp4e-dotr 4.0.2 (Moo Man, Published by Cubicle 7)
wfrp4e-eis 4.0.1 (Moo Man, Published by Cubicle 7)
wfrp4e-eis-maps 6.0.2 (LeRatierBretonnien)
wfrp4e-gm-toolkit 6.0.5 (Jagusti)
wfrp4e-random-treasure 1.0.15 (fmunoz)
wfrp4e-rnhd 4.0.1 (Moo Man, Published by Cubicle 7)
wfrp4e-salzenmund 4.0.1 (Jagusti, Moo Man, Published by Cubicle 7)
wfrp4e-starter-set 4.0.0 (Moo Man, Published by Cubicle 7)
wfrp4e-ubersreik-maps 6.0.1 ()
wfrp4e-unofficial-grimoire 7.0.0 ()
wfrp4e-up-in-arms 4.0.1 (Moo Man, Published by Cubicle 7)
wfrp4e-wom 4.0.1 (Moo Man, Published by Cubicle 7)
wfrp4e-zoo 4.0.1 (Jagusti, Moo Man, Published by Cubicle 7)

[Forien]

Custom Category also does not work with nested tables, this time due to errors (and regardless of Add all items setting):

commons.js:2570 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'customCategory')
    at setProperty (commons.js:2570:16)
    at pile-utilities.js:2047:6
    at Array.forEach (<anonymous>)
    at rollMerchantTables (pile-utilities.js:2045:15)
    at async evaluateTable (MerchantPopulateItemsTab.svelte:122:9)

This happens when Custom Category is set to a Rollable Table that has other Rollable Tables as a results:

[Haxxer]

Fixed in 2.9.0