diff --git a/osu.Game.Tests/Visual/Online/TestSceneBeatmapSetOverlay.cs b/osu.Game.Tests/Visual/Online/TestSceneBeatmapSetOverlay.cs
index f36ef7a8e8..5da05826cf 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneBeatmapSetOverlay.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneBeatmapSetOverlay.cs
@@ -10,6 +10,8 @@ using osu.Game.Rulesets;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps.Drawables;
 using osu.Game.Graphics.Sprites;
@@ -193,7 +195,8 @@ namespace osu.Game.Tests.Visual.Online
                 overlay.ShowBeatmapSet(set);
             });
 
-            AddAssert("shown beatmaps of current ruleset", () => overlay.Header.HeaderContent.Picker.Difficulties.All(b => b.Beatmap.Ruleset.OnlineID == overlay.Header.RulesetSelector.Current.Value.OnlineID));
+            AddAssert("shown beatmaps of current ruleset",
+                () => overlay.Header.HeaderContent.Picker.Difficulties.All(b => b.Beatmap.Ruleset.OnlineID == overlay.Header.RulesetSelector.Current.Value.OnlineID));
             AddAssert("left-most beatmap selected", () => overlay.Header.HeaderContent.Picker.Difficulties.First().State == BeatmapPicker.DifficultySelectorState.Selected);
         }
 
@@ -373,6 +376,39 @@ namespace osu.Game.Tests.Visual.Online
             });
         }
 
+        [Test]
+        public void TestBeatmapsetWithDeletedUser()
+        {
+            AddStep("show map with deleted user", () =>
+            {
+                JObject jsonBlob = JObject.FromObject(getBeatmapSet(), new JsonSerializer
+                {
+                    ReferenceLoopHandling = ReferenceLoopHandling.Ignore
+                });
+
+                jsonBlob["user"] = JToken.Parse(
+                    """
+                    {
+                        "avatar_url": null,
+                        "country_code": null,
+                        "default_group": "default",
+                        "id": null,
+                        "is_active": false,
+                        "is_bot": false,
+                        "is_deleted": true,
+                        "is_online": false,
+                        "is_supporter": false,
+                        "last_visit": null,
+                        "pm_friends_only": false,
+                        "profile_colour": null,
+                        "username": "[deleted user]"
+                    }
+                    """);
+
+                overlay.ShowBeatmapSet(JsonConvert.DeserializeObject<APIBeatmapSet>(JsonConvert.SerializeObject(jsonBlob)));
+            });
+        }
+
         private APIBeatmapSet createManyDifficultiesBeatmapSet()
         {
             var set = getBeatmapSet();
diff --git a/osu.Game/Online/API/Requests/Responses/APIBeatmapSet.cs b/osu.Game/Online/API/Requests/Responses/APIBeatmapSet.cs
index e8e08059b9..dc6c433f29 100644
--- a/osu.Game/Online/API/Requests/Responses/APIBeatmapSet.cs
+++ b/osu.Game/Online/API/Requests/Responses/APIBeatmapSet.cs
@@ -84,11 +84,26 @@ namespace osu.Game.Online.API.Requests.Responses
         /// The creator of this beatmap set.
         /// </summary>
         /// <remarks>
-        /// This is not included when the set is retrieved via <see cref="SearchBeatmapSetsRequest"/>,
-        /// but the creator's ID and username will be filled in this property from the <see cref="AuthorID"/> and <see cref="AuthorString"/> properties.
+        /// This property is set differently depending on the API endpoint. When retrieved via <see cref="SearchBeatmapSetsRequest"/>,
+        /// detailed user info is not included and the creator's ID and username are filled from the <see cref="AuthorID"/> and
+        /// <see cref="AuthorString"/> properties. For other API endpoints, this property is set by the <see cref="author"/> setter.
+        /// </remarks>
+        public APIUser Author = new APIUser();
+
+        /// <summary>
+        /// Helper property to deserialize the detailed user info to <see cref="Author"/>
+        /// </summary>
+        /// <remarks>
+        /// This setter implements special handling for deleted users. When received a user with ID 1, it indicates
+        /// the original user has been deleted. In such cases, the existing <see cref="Author"/> data
+        /// (filled from <see cref="AuthorID"/> and <see cref="AuthorString"/>) is preserved. For valid user,
+        /// the provided user info replaces the existing <see cref="Author"/>.
         /// </remarks>
         [JsonProperty(@"user")]
-        public APIUser Author = new APIUser();
+        private APIUser author
+        {
+            set => Author = value.Id != 1 ? value : Author;
+        }
 
         /// <summary>
         /// The ID of the beatmap set's creator.