diff --git a/CLAUDE.md b/CLAUDE.md
index c1c857df..2d0701b4 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -1106,7 +1106,12 @@ host logger factory (wired in `DriverFactoryBootstrap`; the FOCAS and TwinCAT fa
   `BadNotSupported`).
 - **FOCAS / AbLegacy:** background loops are joined (≤ 5 s) on shutdown.
 - **Driver removal (#609):** removing a driver releases its capability-invoker pipelines and resilience
-  tracker, *then* evicts its telemetry snapshots.
+  tracker, *then* evicts its telemetry snapshots. ⚠️ Both are **tombstoned**, not just cleared: the removed
+  child stops asynchronously and its in-flight subscribe/connect still completes through the invoker (and
+  emits Health) on the thread pool *after* `StopChild`, which used to resurrect the state — so a removed
+  driver's counters were republished forever. `Release` → tracker `Retire` and hub `Evict` ignore every later
+  write for that id until it is spawned again (`Create` → `Reinstate`, `SpawnChild` → `Readmit`). A
+  Watch/`Terminated` release would not work — the late writes land after the actor terminates.
 
 ## Library Preferences