diff --git a/ElvUI/Core/Modules/DataTexts/Difficulty.lua b/ElvUI/Core/Modules/DataTexts/Difficulty.lua
index 9cc776b28e..a610122d42 100644
--- a/ElvUI/Core/Modules/DataTexts/Difficulty.lua
+++ b/ElvUI/Core/Modules/DataTexts/Difficulty.lua
@@ -50,7 +50,7 @@ local DiffIDLabel = { -- also has IDs maintained in Nameplate StyleFilters
 	['N'] = { 1, 14, 38, 173, 198, 201 },
 	['H'] = { 2, 15, 39, 174 },
 	['M'] = { 16, 23, 40 },
-	['20'] = { 148, 185 },
+	['20'] = { 148, 185, 215 },
 	['10N'] = { 3, 175 },
 	['25N'] = { 4, 176 },
 	['10H'] = { 5, 193 },
diff --git a/ElvUI/Core/Modules/DataTexts/Time.lua b/ElvUI/Core/Modules/DataTexts/Time.lua
index e9b77aa863..69db83de49 100644
--- a/ElvUI/Core/Modules/DataTexts/Time.lua
+++ b/ElvUI/Core/Modules/DataTexts/Time.lua
@@ -49,6 +49,22 @@ local displayFormats = {
 	eu_color = ''
 }
 
+local allowID = { -- also has IDs maintained in Nameplate StyleFilters
+	[2] = true,		-- heroic
+	[23] = true,	-- mythic
+	[148] = true,	-- ZG/AQ40
+	[174] = true,	-- heroic (dungeon)
+	[185] = true,	-- normal (legacy)
+	[198] = true,	-- Classic: Season of Discovery
+	[201] = true,	-- Classic: Hardcore
+	[215] = true,	-- Classic: Sunken Temple
+}
+
+local lfrID = {
+	[7] = true,
+	[17] = true
+}
+
 local OnUpdate, db
 
 local function ToTime(start, seconds)
@@ -212,17 +228,14 @@ local function OnEnter()
 	for i = 1, GetNumSavedInstances() do
 		local info = { GetSavedInstanceInfo(i) } -- we want to send entire info
 		local name, _, _, difficulty, locked, extended, _, isRaid = unpack(info)
-		if name and (locked or extended) then
-			local isDungeon = difficulty == 2 or difficulty == 23 or difficulty == 174 or difficulty == 198 or difficulty == 201
-			if isRaid or isDungeon then
-				local isLFR = difficulty == 7 or difficulty == 17
-				local _, _, isHeroic, _, displayHeroic, displayMythic = GetDifficultyInfo(difficulty)
-				local sortName = name .. (displayMythic and 4 or (isHeroic or displayHeroic) and 3 or isLFR and 1 or 2)
-				local difficultyLetter = (displayMythic and difficultyTag[4]) or ((isHeroic or displayHeroic) and difficultyTag[3]) or (isLFR and difficultyTag[1]) or difficultyTag[2]
-				local buttonImg = instanceIconByName[name] and format('|T%s:16:16:0:0:96:96:0:64:0:64|t ', instanceIconByName[name]) or ''
-
-				tinsert(lockedInstances[isRaid and 'raids' or 'dungeons'], { sortName, difficultyLetter, buttonImg, info })
-			end
+		if name and (locked or extended) and (isRaid or allowID[difficulty]) then
+			local isLFR = lfrID[difficulty]
+			local _, _, isHeroic, _, displayHeroic, displayMythic = GetDifficultyInfo(difficulty)
+			local sortName = name .. (displayMythic and 4 or (isHeroic or displayHeroic) and 3 or isLFR and 1 or 2)
+			local difficultyLetter = (displayMythic and difficultyTag[4]) or ((isHeroic or displayHeroic) and difficultyTag[3]) or (isLFR and difficultyTag[1]) or difficultyTag[2]
+			local buttonImg = instanceIconByName[name] and format('|T%s:16:16:0:0:96:96:0:64:0:64|t ', instanceIconByName[name]) or ''
+
+			tinsert(lockedInstances[isRaid and 'raids' or 'dungeons'], { sortName, difficultyLetter, buttonImg, info })
 		end
 	end
 
diff --git a/ElvUI/Core/Modules/Misc/RaidUtility.lua b/ElvUI/Core/Modules/Misc/RaidUtility.lua
index 5501529a86..beeccc2e28 100644
--- a/ElvUI/Core/Modules/Misc/RaidUtility.lua
+++ b/ElvUI/Core/Modules/Misc/RaidUtility.lua
@@ -77,7 +77,7 @@ function RU:SetEnabled(button, enabled, isLeader)
 	if button.SetChecked then
 		button:SetChecked(enabled)
 	else
-		button:SetEnabled(enabled)
+		button.enabled = enabled
 	end
 
 	if button.Text then -- show text grey when isLeader is false, nil and true should be white
@@ -295,7 +295,7 @@ function RU:OnEvent_ReadyCheckButton()
 end
 
 function RU:OnClick_ReadyCheckButton()
-	if RU:InGroup() then
+	if self.enabled and RU:InGroup() then
 		DoReadyCheck()
 	end
 end
@@ -305,7 +305,7 @@ function RU:OnEvent_RoleCheckButton()
 end
 
 function RU:OnClick_RoleCheckButton()
-	if RU:InGroup() then
+	if self.enabled and RU:InGroup() then
 		InitiateRolePoll()
 	end
 end
diff --git a/ElvUI/Core/Modules/Nameplates/StyleFilter.lua b/ElvUI/Core/Modules/Nameplates/StyleFilter.lua
index 083cd7e6d0..4e65e06aec 100644
--- a/ElvUI/Core/Modules/Nameplates/StyleFilter.lua
+++ b/ElvUI/Core/Modules/Nameplates/StyleFilter.lua
@@ -143,6 +143,7 @@ NP.TriggerConditions = {
 		[174] = 'heroic',
 		[185] = 'legacy20normal',
 		[186] = 'legacy40normal',
+		[215] = 'normal', -- Classic: Sunken Temple
 		-- wotlk
 		[175] = 'legacy10normal',
 		[176] = 'legacy25normal',
diff --git a/ElvUI/Core/Modules/UnitFrames/UnitFrames.lua b/ElvUI/Core/Modules/UnitFrames/UnitFrames.lua
index c0a51ea45c..0c3e1b13c8 100644
--- a/ElvUI/Core/Modules/UnitFrames/UnitFrames.lua
+++ b/ElvUI/Core/Modules/UnitFrames/UnitFrames.lua
@@ -556,7 +556,7 @@ do -- IDs maintained in Difficulty Datatext and Nameplate StyleFilters
 			dungeonHeroic = {2, 39, 174},
 			dungeonMythic = {23, 40},
 			dungeonMythicKeystone = {8},
-			raidNormal = {3, 4, 14, 148, 175, 176, 185, 186}, -- 148 is ZG/AQ40
+			raidNormal = {3, 4, 14, 148, 175, 176, 185, 186, 215}, -- 148 is ZG/AQ40, 215 is Sunken Temple
 			raidHeroic = {5, 6, 15, 193, 194},
 			raidMythic = {16},
 		}