Release FSR2 resources when it's not in use. This frees up VRAM but also ensures that the mipmap bias is undone when switching to another AA option.

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/PostProcessLayer.cs

@@ -626,6 +626,11 @@ namespace UnityEngine.Rendering.PostProcessing
                 superResolution.ConfigureCameraViewport(context);
                 context.SetRenderSize(superResolution.renderSize);
             }
+            else
+            {
+                // Ensure all of FSR2's resources are released when it's not in use
+                superResolution.Release();
+            }
 
             context.command = m_LegacyCmdBufferOpaque;
             TextureLerper.instance.BeginFrame(context);