diff --git a/Duplicati/Library/Modules/Builtin/RemoteSynchronizationModule.cs b/Duplicati/Library/Modules/Builtin/RemoteSynchronizationModule.cs
index 74c6a76f2..24a7609d9 100644
--- a/Duplicati/Library/Modules/Builtin/RemoteSynchronizationModule.cs
+++ b/Duplicati/Library/Modules/Builtin/RemoteSynchronizationModule.cs
@@ -139,6 +139,8 @@ public class RemoteSynchronizationModule : IGenericCallbackModule
         {
             m_modes = [];
         }
+        // Fill rest of the modes with default values, if the list is shorter than destinations
+        m_modes.AddRange(Enumerable.Repeat(RemoteSyncTriggerMode.Inline, m_destinations.Count - m_modes.Count));
 
         if (commandlineOptions.TryGetValue(OPTION_SCHEDULE, out var scheduleStr) && !string.IsNullOrWhiteSpace(scheduleStr))
         {
@@ -153,6 +155,8 @@ public class RemoteSynchronizationModule : IGenericCallbackModule
         {
             m_schedules = [];
         }
+        // Fill rest of the schedules with default values, if the list is shorter than destinations
+        m_schedules.AddRange(Enumerable.Repeat(TimeSpan.Zero, m_destinations.Count - m_schedules.Count));
 
         if (commandlineOptions.TryGetValue(OPTION_COUNT, out var countStr) && !string.IsNullOrWhiteSpace(countStr))
         {
@@ -166,6 +170,8 @@ public class RemoteSynchronizationModule : IGenericCallbackModule
         {
             m_counts = [];
         }
+        // Fill rest of the counts with default values, if the list is shorter than destinations
+        m_counts.AddRange(Enumerable.Repeat(0, m_destinations.Count - m_counts.Count));
 
         // Validate parameter lengths
         var destCount = m_destinations.Count;
diff --git a/Duplicati/UnitTest/RemoteSynchronizationModuleTests.cs b/Duplicati/UnitTest/RemoteSynchronizationModuleTests.cs
index 37f343437..86d4fb358 100644
--- a/Duplicati/UnitTest/RemoteSynchronizationModuleTests.cs
+++ b/Duplicati/UnitTest/RemoteSynchronizationModuleTests.cs
@@ -651,7 +651,10 @@ namespace Duplicati.UnitTest
             var modes = module.GetType().GetField("m_modes", BINDING_FLAGS).GetValue(module) as List<RemoteSyncTriggerMode>;
 
             Assert.AreEqual(3, destinations.Count);
-            Assert.AreEqual(2, modes.Count); // Modes list has the provided values, defaults used for missing indices
+            Assert.AreEqual(3, modes.Count); // Modes list has the provided values, defaults used for missing indices
+            Assert.AreEqual(RemoteSyncTriggerMode.Inline, modes[0]);
+            Assert.AreEqual(RemoteSyncTriggerMode.Scheduled, modes[1]);
+            Assert.AreEqual(RemoteSyncTriggerMode.Inline, modes[2]);
         }
 
         [Test]