What steps will reproduce the problem?

1. Have shestakui classic version 0.88 (most updated version on twitch)
2. Be in a raid and get in combat
3. Attempt to move someone between groups as the leader
4. I have tried disabling every addon except shestakui and it still wont let me drag people across groups without throwing errors

What version of ShestakUI are you using? (Stating 'latest' is not useful) 0.88

Do you have an error log of what happened?

Date: 2020-09-18 10:31:42
ID: 1
Error occured in: AddOn: ShestakUI
Count: 4
Message: Note: AddOn ShestakUI attempted to call a protected function (RaidGroupButton1:ClearAllPoints()) during combat lockdown.
Debug:
[C]: ClearAllPoints()
Blizzard_RaidUI\Blizzard_RaidUI.lua:633: RaidGroupButton_OnDragStop()
[string ":OnDragStop"]:5:
[string ":OnDragStop"]:1
Locals:
None
AddOns:
LibTotemInfo, v1.0.4
Swatter, v8.2.6377 (SwimmingSeadragon)
TotemModFix, v0.0.10
AtlasLootClassic, vv1.5.6
AtlasLootClassicData, vv1.5.6
AtlasLootClassicDungeonsAndRaids, vv1.5.6
AucAdvanced, v8.2.6430 (SwimmingSeadragon)
AucFilterBasic, v8.2.6364 (SwimmingSeadragon)
AucStatHistogram, v8.2.6366 (SwimmingSeadragon)
AucStatiLevel, v8.2.6370 (SwimmingSeadragon)
AucStatPurchased, v8.2.6367 (SwimmingSeadragon)
AucStatSimple, v8.2.6399 (SwimmingSeadragon)
AucStatStdDev, v8.2.6369 (SwimmingSeadragon)
AucUtilFixAH, v8.2.6371 (SwimmingSeadragon)
BeanCounter, v8.2.6434 (SwimmingSeadragon)
DBMCore, v1.13.60
DBMDefaultSkin, v
DBMStatusBarTimers, v
DejaClassicStats, v1305r004
Details, v
DetailsStreamer, v
DetailsTinyThreat, v
GatherMate2, v1.45.5
GearMenu, vv1.4.0
ItemRack, v
KHunterTimers, v1.5-classic
NauticusClassic, v1.3.1
NovaInstanceTracker, v1.11
NovaWorldBuffs, v1.79
Questie, v6.0.5
RCLootCouncilClassic, v0.11.2
ShestakUI, v0.88
ShestakUIConfig, v0.88
SimpleEnergyBar, v@project-version@
SlideBar, v8.2.6375 (SwimmingSeadragon)
Stubby, v8.2.6376 (SwimmingSeadragon)
ThreatClassic2, v2.24
TotemTimers, v1.08
TrackResources, v0.11
BlizRuntimeLib_enUS v1.13.5.11305
(ck=4eb)

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

There is no version 0.88 on Twitch so no idea what you're using, regardless, this repo has not been updated for a long time.
Try this fork: https://github.com/Wetxius/ShestakUI_Classic

Please update me~~!