diff --git a/code-reviews/Driver.AbLegacy/findings.md b/code-reviews/Driver.AbLegacy/findings.md
index 7e7b6ec..67c92c3 100644
--- a/code-reviews/Driver.AbLegacy/findings.md
+++ b/code-reviews/Driver.AbLegacy/findings.md
@@ -242,7 +242,7 @@ successful poll so a single failed read does not flap the surface.
 | Severity | Medium |
 | Category | Error handling & resilience |
 | Location | `AbLegacyDriver.cs:41-74` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** `InitializeAsync` starts probe loops with `Task.Run` inside the try
 block. If `InitializeAsync` fails - or is re-entered - after some probe loops are
@@ -257,7 +257,7 @@ and `CancellationTokenSource`s alive holding libplctag handles. Separately,
 `ShutdownAsync` (cancel probe CTSs, dispose runtimes, clear dictionaries) before
 rethrowing, so a failed initialise leaves no live background work.
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-22 — `InitializeAsync` catch block now cancels and disposes probe CTSs, calls `DisposeRuntimes`, and clears `_devices`/`_tagsByName` before rethrowing, leaving no orphaned background tasks or handles.
 
 ### Driver.AbLegacy-010
 
diff --git a/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy/AbLegacyDriver.cs b/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy/AbLegacyDriver.cs
index 17d5759..44a451b 100644
--- a/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy/AbLegacyDriver.cs
+++ b/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy/AbLegacyDriver.cs
@@ -74,6 +74,20 @@ public sealed class AbLegacyDriver : IDriver, IReadable, IWritable, ITagDiscover
         catch (Exception ex)
         {
             _health = new DriverHealth(DriverState.Faulted, null, ex.Message);
+            // Tear down any probe loops and cached state that were created before the failure so
+            // that a caller who catches and abandons (rather than retrying via ReinitializeAsync)
+            // doesn't leave orphaned background tasks, CancellationTokenSources, and libplctag
+            // handles alive. Mirrors the body of ShutdownAsync without awaiting the poll engine
+            // (nothing has been subscribed yet at init time).
+            foreach (var state in _devices.Values)
+            {
+                try { state.ProbeCts?.Cancel(); } catch { }
+                state.ProbeCts?.Dispose();
+                state.ProbeCts = null;
+                state.DisposeRuntimes();
+            }
+            _devices.Clear();
+            _tagsByName.Clear();
             throw;
         }
         return Task.CompletedTask;