Temporarily disabled new function of suppressing non-matched input, it might not be needed. Added proper UI disable state to RebindMenu since RebindOverlay is essentially another "window" grabbing input context. Hence the sample should behave like this since its the most correct way instead of suppressing UI input.

Author: ekcoh

Assets/Samples/RebindingUI/CanvasGroupModifier.cs

@@ -0,0 +1,35 @@
+namespace UnityEngine.InputSystem.Samples.RebindUI
+{
+    /// <summary>
+    /// Simple utility that modifies a referenced CanvasGroup while being active.
+    /// </summary>
+    public class CanvasGroupModifier : MonoBehaviour
+    {
+        [Tooltip("The Canvas Group to be modified while this component is active")]
+        public CanvasGroup canvasGroup;
+
+        [Tooltip("The interactable setting to use for the Canvas Group while this component is active")]
+        public bool interactable = false;
+
+        private bool m_SavedInteractable;
+
+        void OnEnable()
+        {
+            if (canvasGroup != null)
+            {
+                // Save current setting and override
+                m_SavedInteractable = canvasGroup.interactable;
+                canvasGroup.interactable = interactable;
+            }
+        }
+
+        void OnDisable()
+        {
+            if (canvasGroup != null)
+            {
+                // Restore previous setting
+                canvasGroup.interactable = m_SavedInteractable;
+            }
+        }
+    }
+}

Assets/Samples/RebindingUI/CanvasGroupModifier.cs.meta

@@ -305,9 +305,9 @@ void CleanUp()
                         CleanUp();
                     })
                 // We want matching events to be suppressed during rebinding (this is also default).
-                .WithMatchingEventsBeingSuppressed()
+                //.WithMatchingEventsBeingSuppressed()
                 // Since this sample has no interactable UI during rebinding we also want to suppress non-matching events.
-                .WithNonMatchingEventsBeingSuppressed()
+                //.WithNonMatchingEventsBeingSuppressed()
                 // We want device state to update but not actions firing during rebinding.
                 .WithActionsBeingSuppressed()
                 // Since this sample has no UI to cancle rebinding we timeout after not receiving input for a period of time.

Assets/Samples/RebindingUI/RebindActionUI.cs

@@ -102,7 +102,7 @@ MonoBehaviour:
     m_HighlightedColor: {r: 0.36173913, g: 0.4408696, b: 0.65, a: 1}
     m_PressedColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 1}
     m_SelectedColor: {r: 0.8679245, g: 0.4550042, b: 0.045033824, a: 1}
-    m_DisabledColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 0.5019608}
+    m_DisabledColor: {r: 0.21960784, g: 0.21960784, b: 0.25882354, a: 1}
     m_ColorMultiplier: 1
     m_FadeDuration: 0.1
   m_SpriteState:
@@ -389,7 +389,7 @@ MonoBehaviour:
   m_BindingText: {fileID: 690190895482579582}
   m_RebindOverlay: {fileID: 0}
   m_RebindText: {fileID: 0}
-  m_DefaultInputActions: {fileID: 0}
+  m_RebindInfo: {fileID: 0}
   m_UpdateBindingUIEvent:
     m_PersistentCalls:
       m_Calls: []
@@ -580,7 +580,7 @@ MonoBehaviour:
     m_HighlightedColor: {r: 0.36078432, g: 0.4392157, b: 0.6509804, a: 1}
     m_PressedColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 1}
     m_SelectedColor: {r: 0.8666667, g: 0.45490196, b: 0.043137256, a: 1}
-    m_DisabledColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 0.5019608}
+    m_DisabledColor: {r: 0.22, g: 0.22, b: 0.25882354, a: 1}
     m_ColorMultiplier: 1
     m_FadeDuration: 0.1
   m_SpriteState:

Assets/Samples/RebindingUI/RebindUIPrefab.prefab

@@ -1622,6 +1622,7 @@ GameObject:
   - component: {fileID: 508436408}
   - component: {fileID: 508436407}
   - component: {fileID: 508436409}
+  - component: {fileID: 508436410}
   m_Layer: 5
   m_Name: RebindMenu
   m_TagString: Untagged
@@ -1717,6 +1718,18 @@ MonoBehaviour:
           m_StringArgument: 
           m_BoolArgument: 0
         m_CallState: 2
+--- !u!225 &508436410
+CanvasGroup:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 508436405}
+  m_Enabled: 1
+  m_Alpha: 1
+  m_Interactable: 1
+  m_BlocksRaycasts: 1
+  m_IgnoreParentGroups: 0
 --- !u!224 &510051365 stripped
 RectTransform:
   m_CorrespondingSourceObject: {fileID: 1777307397533242038, guid: 0648a5c163cef41038b804a34b4b80e7,
@@ -3994,6 +4007,7 @@ GameObject:
   - component: {fileID: 1106689462}
   - component: {fileID: 1106689464}
   - component: {fileID: 1106689463}
+  - component: {fileID: 1106689465}
   m_Layer: 5
   m_Name: RebindOverlay
   m_TagString: Untagged
@@ -4060,6 +4074,20 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1106689461}
   m_CullTransparentMesh: 0
+--- !u!114 &1106689465
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1106689461}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: f694bb5379aca43c790706ceb4191b31, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  canvasGroup: {fileID: 508436410}
+  interactable: 0
 --- !u!1 &1121800141
 GameObject:
   m_ObjectHideFlags: 0

Assets/Samples/RebindingUI/RebindingUISampleScene.unity

@@ -2138,7 +2138,7 @@ public RebindingOperation OnMatchWaitForAnother(float seconds)
             public RebindingOperation WithActionsBeingSuppressed(bool value = true)
             {
                 ThrowIfRebindInProgress();
-                m_TargetInputEventHandledPolicy = value 
+                m_TargetInputEventHandledPolicy = value
                     ? InputEventHandledPolicy.SuppressActionUpdates
                     : InputEventHandledPolicy.SuppressStateUpdates;
                 return this;