diff --git a/BunkerSiloAIDriver.lua b/BunkerSiloAIDriver.lua
index 0cf9149f3..d07efbbb0 100644
--- a/BunkerSiloAIDriver.lua
+++ b/BunkerSiloAIDriver.lua
@@ -206,7 +206,7 @@ function BunkerSiloAIDriver:isHeapSearchAllowed()
 end
 
 function BunkerSiloAIDriver:getWorkWidth()
-	return self.courseGeneratorSettings.workWidth:get()
+	return math.max(self.courseGeneratorSettings.workWidth:get(),3)
 end
 
 --- If true then the drive into silo course is reverse and 
diff --git a/base.lua b/base.lua
index 7d4c0ddef..a278248c3 100644
--- a/base.lua
+++ b/base.lua
@@ -401,6 +401,9 @@ function courseplay:onUpdate(dt)
 			---set correctly at the first courseplay:setAIDriver() call.
 			self.cp.driver:postInit()
 		end
+		--- The saved value gets applied, before all implements are attached.
+		--- So only allow automatic changes after all implements are attached on savegame start.
+		self.cp.courseGeneratorSettings.workWidth:postInit()
 		self.cp.settings.driverMode:postInit()
 		--- Refreshes all field number settings on start,
 		--- as clients might have a corrupted version.
diff --git a/course-generator/CourseGeneratorSettings.lua b/course-generator/CourseGeneratorSettings.lua
index ee9328eea..e53efe33a 100644
--- a/course-generator/CourseGeneratorSettings.lua
+++ b/course-generator/CourseGeneratorSettings.lua
@@ -125,13 +125,20 @@ function WorkWidthSetting:init(vehicle)
 	-- and parentName is not set.
 	-- TODO: move creating the course gen (or others too?) settings to onPostLoad() (instead of onLoad())
 	-- TODO: add parentName to the constructor of the settings instead of the explicit setter.
-	self:setToDefault(true)
 	self:refresh()
 	self.WORK_WIDTH_EVENT = self:registerFloatEvent(self.setWorkWidthFromNetwork)
 	self.AUTO_WORK_WIDTH_EVENT = self:registerFloatEvent(self.setAutoWorkWidthFromNetwork)
 	if g_server then
 		self:updateAutoWorkWidth()
+		self:setToDefault(true)
 	end
+	self.loaded = false
+end
+
+--- The saved value gets applied, before all implements are attached.
+--- So only allow automatic changes after all implements are attached on savegame start.
+function WorkWidthSetting:postInit()
+	self.loaded = true
 end
 
 function WorkWidthSetting:loadFromXml(xml, parentKey)
@@ -234,9 +241,13 @@ end
 --- so we update it on a attach/detach of an implement and 
 --- send the changed value with an event to the client.
 function WorkWidthSetting:updateAutoWorkWidth()
+	if g_server == nil then return end
 	local value = WorkWidthUtil.getAutomaticWorkWidth(self.vehicle) or 0
 	self.automaticValue:set(value,true)
-	self.value:set(value,true)
+	if self.loaded then
+		self.value:set(value,true)
+	end
+	self:refresh()
 	self:sendAutoWorkWidthEvent(value)
 end
 
diff --git a/modDesc.xml b/modDesc.xml
index 61fb5226f..3af56289b 100644
--- a/modDesc.xml
+++ b/modDesc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" standalone="no" ?>
 <modDesc descVersion="53">
-	<version>6.4.1.2</version>
+	<version>6.4.1.3</version>
 	<author><![CDATA[Courseplay.devTeam]]></author>
 	<title>
 		<en>CoursePlay</en>
diff --git a/toolManager.lua b/toolManager.lua
index 912b3e8cb..ffe5a1fcc 100644
--- a/toolManager.lua
+++ b/toolManager.lua
@@ -556,7 +556,7 @@ end
 ---@param object table
 ---@param logPrefix string
 function WorkWidthUtil.getShieldWorkWidth(object,logPrefix)
-	if object.spec_leveler then 
+	if object.spec_leveler and object.spec_leveler.nodes and object.spec_leveler.nodes[1] and object.spec_leveler.nodes[1].maxDropWidth then 
 		local width = object.spec_leveler.nodes[1].maxDropWidth * 2
 		WorkWidthUtil.debug(object,logPrefix,'is a shield with work width: %.1f',width)
 		return width