diff --git a/src/main/java/fr/xephi/authme/process/join/AsynchronousJoin.java b/src/main/java/fr/xephi/authme/process/join/AsynchronousJoin.java
index bc097276..4d277bda 100644
--- a/src/main/java/fr/xephi/authme/process/join/AsynchronousJoin.java
+++ b/src/main/java/fr/xephi/authme/process/join/AsynchronousJoin.java
@@ -191,9 +191,7 @@ public class AsynchronousJoin implements AsynchronousProcess {
                 int blindTimeOut = (registrationTimeout <= 0) ? 99999 : registrationTimeout;
 
                 // AuthMeReReloaded start - Fix async potion apply on Folia
-                bukkitService.runTask(() -> {
-                    player.addPotionEffect(new PotionEffect(PotionEffectType.BLINDNESS, blindTimeOut, 2));
-                });
+                bukkitService.runTaskSyncIfFolia(() -> player.addPotionEffect(new PotionEffect(PotionEffectType.BLINDNESS, blindTimeOut, 2)));
                 // AuthMeReReloaded end
 
             }
diff --git a/src/main/java/fr/xephi/authme/service/BukkitService.java b/src/main/java/fr/xephi/authme/service/BukkitService.java
index c73257d6..ff59329f 100644
--- a/src/main/java/fr/xephi/authme/service/BukkitService.java
+++ b/src/main/java/fr/xephi/authme/service/BukkitService.java
@@ -6,6 +6,7 @@ import fr.xephi.authme.AuthMe;
 import fr.xephi.authme.initialization.SettingsDependent;
 import fr.xephi.authme.settings.Settings;
 import fr.xephi.authme.settings.properties.PluginSettings;
+import fr.xephi.authme.util.Utils;
 import org.bukkit.BanEntry;
 import org.bukkit.BanList;
 import org.bukkit.Bukkit;
@@ -34,6 +35,7 @@ public class BukkitService implements SettingsDependent {
     public static final int TICKS_PER_SECOND = 20;
     /** Number of ticks per minute. */
     public static final int TICKS_PER_MINUTE = 60 * TICKS_PER_SECOND;
+    private static final boolean IS_FOLIA = Utils.isClassLoaded("io.papermc.paper.threadedregions.RegionizedServer");
 
     private final AuthMe authMe;
     private boolean useAsyncTasks;
@@ -139,6 +141,18 @@ public class BukkitService implements SettingsDependent {
         getScheduler().runTaskAsynchronously(task);
     }
 
+    /**
+     * Runs the task synchronously if we are on a Folia server, else runs normally.
+     * @param task the task to run
+     */
+    public void runTaskSyncIfFolia(Runnable task) {
+        if (IS_FOLIA) {
+            runTask(task);
+        } else {
+            task.run();
+        }
+    }
+
     /**
      * <b>Asynchronous tasks should never access any API in Bukkit. Great care
      * should be taken to assure the thread-safety of asynchronous tasks.</b>