Running Software (please complete the following information):

• Game patch 8.1.0.29297 (the last of February 5th)
• Addon version 8.1.5

Describe the bug
LUA error

To Reproduce
Steps to reproduce the behavior:

0. Launch WoW
1. Go to Bag
2. Right Click on button at left down (next to number of bags slots, 32/148 in my case)
3. When Bank open shows the LUA error.
   3a. The error occur only 1 time in the WoW session. If you open before step 2 the bank talking with a banker the error is not reproducible.

Expected behavior
Open my personal bank

Error Logs

Taken to catchup LUA errors:

Date: 2019-02-06 16:11:49
ID: 1
Error occured in: Global
Count: 6
Message: ...AddOns\Bagnon\external\Wildpants\components\item.lua line 267:
attempt to compare number with string
Debug:
[C]: ?
...AddOns\Bagnon\external\Wildpants\components\item.lua:267: UpdateBorder()
...AddOns\Bagnon\external\Wildpants\components\item.lua:228: Update()
...AddOns\Bagnon\external\Wildpants\components\item.lua:124:
...AddOns\Bagnon\external\Wildpants\components\item.lua:119
[C]: Show()
..\FrameXML\UIParent.lua:3169: ShowUIPanel()
...ace\AddOns\Bagnon\external\Wildpants\core\frames.lua:55:
...ace\AddOns\Bagnon\external\Wildpants\core\frames.lua:51
(tail call): ?
Bagnon\components\brokerPlugin.lua:23: OnClick()
Bagnon\components\brokerDisplay.lua:114:
Bagnon\components\brokerDisplay.lua:111
Locals:

AddOns:
Swatter, v7.3.1 (<%codename%>)
ACP, vr259
AdvancedInterfaceOptions, v1.2.9
Altoholic, vr190
AtlasLoot, vv8.09.00
AtlasLootBattleforAzeroth, vv8.09.00
AtlasLootBurningCrusade, vv8.09.00
AtlasLootCataclysm, vv8.09.00
AtlasLootClassic, vv8.09.00
AtlasLootLegion, vv8.09.00
AtlasLootMistsofPandaria, vv8.09.00
AtlasLootWarlordsofDraenor, vv8.09.00
AtlasLootWrathoftheLichKing, vv8.09.00
BagBrother, v
Bagnon, v8.1.5
Bartender4, v4.8.2
BasicThreatBar, vr95-beta
ChampionCommander, v1.1.2 80100
DataStore, vr65
DataStoreAgenda, vr29
DataStoreAuctions, vr50
DataStoreCharacters, vr43
DataStoreContainers, vr59
DataStoreCrafts, vr82
DataStoreCurrencies, vr38
DataStoreInventory, vr53
DataStoreMails, vr52
DataStoreSpells, vr32
DataStoreStats, vr31
DataStoreTalents, vr61
DBMArchaeology, v
DBMCore, v8.1.8-10-g627ef0831
DBMDefaultSkin, v
DBMStatusBarTimers, v
Decursive, v2.7.6.2
ExRT, v4000
GatherMate2, v1.43.5
GatherMateSharing, vv1.11
HandyNotes, vv1.5.4
HandyNotesBattleForAzerothAchievments, vv7
HandyNotesBattleForAzerothTreasures, v1
HandyNotesCamelFigurines, v1.3
HandyNotesHallowsEnd, vv1.4.3-5-g4f0033d
HandyNotesLunarFestival, vv1.6.1-5-g117d145
HandyNotesSummerFestival, vv1.5-1-ga5d88e7
InstanceAchievementTracker, v2.31.0
LibSharedMedia30, v3.0-106
MapCoords, v0.28
MountJournalEnhanced, v2.2.1
NeatPlates, v6.22.3c-Transition
NeatPlatesNeon, v
NeatPlatesHub, v
NeatPlatesWidgets, v
Nomepidas, v
Overachiever, v1.0.5
OverachieverCache, v1.0.5
OverachieverTabs, v1.0.5
PetBattleTeams, v3.3.11
PetTracker, v8.1.1
PetTrackerBreeds, v8.1.1
PetTrackerUpgrades, v8.1.1
Quartz, v3.4.0-3-g65bcdc4
Skada, v1.7.5
SlideBar, v7.3.1 (<%codename%>)
ToyBoxEnhanced, v2.1
WarfrontRareTracker, v0.9.7-1
WeakAuras, v2.11.3-3-g30c9071
WIM, v588
WorldQuestTracker, v
ZeldaLootLite, v1.0.0
ZPerl, v5.7.1
ZPerlArcaneBar, v
ZPerlParty, v
ZPerlPlayer, v
ZPerlPlayerBuffs, v
ZPerlTarget, v
ZPerlTargetTarget, v
BlizRuntimeLib_esES v8.1.0.80100
(ck=829)

I do an important edit to point 3 of Reproduce Error and add a point 3a to clarify some things about error.