diff --git a/doc/31-Changelog.md b/doc/31-Changelog.md
index 67f2579..3438bb9 100644
--- a/doc/31-Changelog.md
+++ b/doc/31-Changelog.md
@@ -7,12 +7,13 @@ documentation before upgrading to a new release.
 
 Released closed milestones can be found on [GitHub](https://github.com/Icinga/icinga-powershell-framework/milestones?state=closed).
 
-## 1.4.0 (pending)
+## 1.4.0 (2021-03-02)
 
 [Issue and PRs](https://github.com/Icinga/icinga-powershell-framework/milestone/11?closed=1)
 
 ### Enhancements
 
+* [#180](https://github.com/Icinga/icinga-powershell-framework/pull/180) Ensure check data are separated from each thread and not accessible from one thread to another to prevent conflicting results
 * [#193](https://github.com/Icinga/icinga-powershell-framework/pull/193) Adds optional support for adding milliseconds to `Get-IcingaUnixTime` with the `-Milliseconds` argument for more detailed time comparison
 * [#198](https://github.com/Icinga/icinga-powershell-framework/pull/198) Adds support to flush the content of the Icinga Agent API directory with a single Cmdlet `Clear-IcingaAgentApiDirectory`
 * [#203](https://github.com/Icinga/icinga-powershell-framework/pull/203) Removes experimental state of the Icinga PowerShell Framework code caching and adds docs on how to use the feature
diff --git a/lib/core/framework/Get-IcingaCheckSchedulerPerfData.psm1 b/lib/core/framework/Get-IcingaCheckSchedulerPerfData.psm1
index a5a4eda..d3e4276 100644
--- a/lib/core/framework/Get-IcingaCheckSchedulerPerfData.psm1
+++ b/lib/core/framework/Get-IcingaCheckSchedulerPerfData.psm1
@@ -17,24 +17,12 @@
 
 function Get-IcingaCheckSchedulerPerfData()
 {
-    if ($null -eq $IcingaDaemonData) {
+    if ($null -eq $global:Icinga) {
         return $null;
     }
 
-    if ($IcingaDaemonData.ContainsKey('IcingaThreadContent') -eq $FALSE) {
-        return $null;
-    }
-
-    if ($IcingaDaemonData.IcingaThreadContent.ContainsKey('Scheduler') -eq $FALSE) {
-        return $null;
-    }
-
-    if ($IcingaDaemonData.IcingaThreadContent.Scheduler.ContainsKey('PluginPerfData') -eq $FALSE) {
-        return $null;
-    }
-
-    $PerfData = $IcingaDaemonData.IcingaThreadContent.Scheduler.PluginPerfData;
-    $IcingaDaemonData.IcingaThreadContent.Scheduler.PluginPerfData = @();
+    $PerfData               = $global:Icinga.PerfData;
+    $global:Icinga.PerfData = @();
 
     return $PerfData;
 }
diff --git a/lib/core/framework/Get-IcingaCheckSchedulerPluginOutput.psm1 b/lib/core/framework/Get-IcingaCheckSchedulerPluginOutput.psm1
index 885dabd..5a96bab 100644
--- a/lib/core/framework/Get-IcingaCheckSchedulerPluginOutput.psm1
+++ b/lib/core/framework/Get-IcingaCheckSchedulerPluginOutput.psm1
@@ -17,24 +17,12 @@
 
 function Get-IcingaCheckSchedulerPluginOutput()
 {
-    if ($null -eq $IcingaDaemonData) {
+    if ($null -eq $global:Icinga) {
         return $null;
     }
 
-    if ($IcingaDaemonData.ContainsKey('IcingaThreadContent') -eq $FALSE) {
-        return $null;
-    }
-
-    if ($IcingaDaemonData.IcingaThreadContent.ContainsKey('Scheduler') -eq $FALSE) {
-        return $null;
-    }
-
-    if ($IcingaDaemonData.IcingaThreadContent.Scheduler.ContainsKey('PluginCache') -eq $FALSE) {
-        return $null;
-    }
-
-    $CheckResult = [string]::Join("`r`n", $IcingaDaemonData.IcingaThreadContent.Scheduler.PluginCache);
-    $IcingaDaemonData.IcingaThreadContent.Scheduler.PluginCache = @();
+    $CheckResult = [string]::Join("`r`n", $global:Icinga.CheckResults);
+    $global:Icinga.CheckResults = @();
 
     return $CheckResult;
 }
diff --git a/lib/core/framework/New-IcingaCheckSchedulerEnvironment.psm1 b/lib/core/framework/New-IcingaCheckSchedulerEnvironment.psm1
index bc737ec..5fa7972 100644
--- a/lib/core/framework/New-IcingaCheckSchedulerEnvironment.psm1
+++ b/lib/core/framework/New-IcingaCheckSchedulerEnvironment.psm1
@@ -1,8 +1,12 @@
 function New-IcingaCheckSchedulerEnvironment()
 {
+    # Legacy code
     $IcingaDaemonData.IcingaThreadContent.Add('Scheduler', @{ });
-    if ($IcingaDaemonData.IcingaThreadContent['Scheduler'].ContainsKey('PluginCache') -eq $FALSE) {
-        $IcingaDaemonData.IcingaThreadContent['Scheduler'].Add('PluginCache', @());
-        $IcingaDaemonData.IcingaThreadContent['Scheduler'].Add('PluginPerfData', @());
+
+    if ($null -eq $global:Icinga) {
+        $global:Icinga = @{};
     }
+
+    $global:Icinga.Add('CheckResults', @());
+    $global:Icinga.Add('PerfData', @());
 }
diff --git a/lib/daemons/ServiceCheckDaemon/Start-IcingaServiceCheckDaemon.psm1 b/lib/daemons/ServiceCheckDaemon/Start-IcingaServiceCheckDaemon.psm1
index ecf1f60..b9e821f 100644
--- a/lib/daemons/ServiceCheckDaemon/Start-IcingaServiceCheckDaemon.psm1
+++ b/lib/daemons/ServiceCheckDaemon/Start-IcingaServiceCheckDaemon.psm1
@@ -101,6 +101,9 @@ function Start-IcingaServiceCheckTask()
                 try {
                     & $CheckCommand @Arguments | Out-Null;
 
+                    Get-IcingaCheckSchedulerPerfData | Out-Null;
+                    Get-IcingaCheckSchedulerPluginOutput | Out-Null;
+
                     $UnixTime = Get-IcingaUnixTime;
 
                     foreach ($result in $IcingaDaemonData.BackgroundDaemon.ServiceCheckScheduler[$CheckCommand]['results'].Keys) {
diff --git a/lib/icinga/plugin/Write-IcingaPluginOutput.psm1 b/lib/icinga/plugin/Write-IcingaPluginOutput.psm1
index ab593bc..f45b6a1 100644
--- a/lib/icinga/plugin/Write-IcingaPluginOutput.psm1
+++ b/lib/icinga/plugin/Write-IcingaPluginOutput.psm1
@@ -7,8 +7,7 @@ function Write-IcingaPluginOutput()
     if ($global:IcingaDaemonData.FrameworkRunningAsDaemon -eq $FALSE) {
         Write-IcingaConsolePlain $Output;
     } else {
-        if ($global:IcingaDaemonData.IcingaThreadContent.ContainsKey('Scheduler')) {
-            $global:IcingaDaemonData.IcingaThreadContent['Scheduler']['PluginCache'] += $Output;
-        }
+        # New behavior with local thread separated results
+        $global:Icinga.CheckResults += $Output;
     }
 }
diff --git a/lib/icinga/plugin/Write-IcingaPluginPerfData.psm1 b/lib/icinga/plugin/Write-IcingaPluginPerfData.psm1
index ddb4a83..10a3b60 100644
--- a/lib/icinga/plugin/Write-IcingaPluginPerfData.psm1
+++ b/lib/icinga/plugin/Write-IcingaPluginPerfData.psm1
@@ -45,9 +45,8 @@ function Get-IcingaPluginPerfDataContent()
                     $cachedresult = (New-IcingaPerformanceDataEntry -PerfDataObject $data -Label $SearchEntry -Value $checkresult.Value);
 
                     if ($AsObject) {
-                        if ($global:IcingaDaemonData.IcingaThreadContent.ContainsKey('Scheduler')) {
-                            $global:IcingaDaemonData.IcingaThreadContent['Scheduler']['PluginPerfData'] += $cachedresult;
-                        }
+                        # New behavior with local thread separated results
+                        $global:Icinga.PerfData += $cachedresult;
                     }
                     $PerfDataOutput += $cachedresult;
                 }
@@ -56,9 +55,8 @@ function Get-IcingaPluginPerfDataContent()
             $compiledPerfData = (New-IcingaPerformanceDataEntry $data);
 
             if ($AsObject) {
-                if ($global:IcingaDaemonData.IcingaThreadContent.ContainsKey('Scheduler')) {
-                    $global:IcingaDaemonData.IcingaThreadContent['Scheduler']['PluginPerfData'] += $compiledPerfData;
-                }
+                # New behavior with local thread separated results
+                $global:Icinga.PerfData += $compiledPerfData;
             }
             $PerfDataOutput += $compiledPerfData;
         }