diff --git a/pages/clustering/high-availability/how-high-availability-works.mdx b/pages/clustering/high-availability/how-high-availability-works.mdx
index 682ff4540..454f92fc9 100644
--- a/pages/clustering/high-availability/how-high-availability-works.mdx
+++ b/pages/clustering/high-availability/how-high-availability-works.mdx
@@ -123,7 +123,14 @@ well as `SET DATABASE SETTING` and `RELOAD SSL`.
 
 Since coordinators do not store user data, the following restrictions apply:
 - **Snapshots are automatically disabled** on coordinators, even if
-  `--storage-snapshot-interval-sec` is set.
+  `--storage-snapshot-interval-sec` is set. The `storage.snapshot.interval`
+  setting is not registered on coordinators, so attempting to read or modify it
+  via `SHOW DATABASE SETTING` / `SET DATABASE SETTING` returns an unknown
+  setting error.
+- **The `--query-modules-directory` flag is ignored** on coordinators.
+  Coordinators do not execute data queries, so query modules are never loaded
+  and the embedded Python runtime is not initialized. The flag is still accepted
+  (so packaged defaults do not need to be overridden) but has no effect.
 - **The `--init-file` and `--init-data-file` flags are not supported** on
   coordinators (and likewise not supported on data instances in HA mode). The
   instance will fail to start if either flag is provided.
diff --git a/pages/database-management/configuration.mdx b/pages/database-management/configuration.mdx
index 70a005dd3..7c49244f8 100644
--- a/pages/database-management/configuration.mdx
+++ b/pages/database-management/configuration.mdx
@@ -451,7 +451,7 @@ execution in Memgraph.
 | `--query-cost-planner=true`                                                     | Use the cost-estimating query planner. When enabled (`true`), Memgraph generates multiple query plans, selecting the one with the lowest cost. If disabled (`false`), it creates a single plan that is executed. | `[bool]`   |
 | `--query-execution-timeout-sec=600`                                             | Maximum allowed query execution time. <br/>Queries exceeding this limit will be aborted. Value of 0 means no limit.                                                                                              | `[uint64]` |
 | `--query-max-plans=1000`                                                        | Maximum number of generated plans for a query.                                                                                                                                                                   | `[uint64]` |
-| `--query-modules-directory=/usr/lib/memgraph/query_modules`                     | Directory where modules with custom query procedures are stored. NOTE: Multiple comma-separated directories can be defined.                                                                                      | `[string]` |
+| `--query-modules-directory=/usr/lib/memgraph/query_modules`                     | Directory where modules with custom query procedures are stored. NOTE: Multiple comma-separated directories can be defined. The flag is ignored on coordinator instances in a [high availability](/clustering/high-availability) setup.                                                                                      | `[string]` |
 | `--query-plan-cache-max-size=1000`                                              | Maximum number of query plans to cache.                                                                                                                                                                          | `[int32]`  |
 | `--query-vertex-count-to-expand-existing=10`                                    | Maximum count of indexed vertices which provoke indexed lookup and then expand to existing, <br/>instead of a regular expand. Default is 10, to turn off use -1.                                                 | `[int64]`  |
 | `--query-log-directory=/var/log/memgraph/session_trace`                         | Location to store log files for session tracing.                                                                                                                                                                 | `[string]` |
diff --git a/pages/release-notes.mdx b/pages/release-notes.mdx
index cf86405d7..0e8021b15 100644
--- a/pages/release-notes.mdx
+++ b/pages/release-notes.mdx
@@ -48,6 +48,21 @@ guide.
 
 ### Memgraph v3.11.0 - June 17th, 2026
 
+{<h4 className="custom-header">⚠️ Breaking changes</h4>}
+
+- `--query-modules-directory` is now ignored on coordinator instances and
+  query modules are no longer loaded there. The embedded Python runtime is also
+  skipped on coordinators, so any Python-based modules that previously loaded
+  (but were unusable) will no longer be initialized. The flag itself is still
+  accepted so packaged defaults do not need to be overridden when starting a
+  coordinator. Additionally, `storage.snapshot.interval` is no longer registered
+  as a runtime setting on coordinators — `SHOW DATABASE SETTING
+  'storage.snapshot.interval'` and `SET DATABASE SETTING
+  'storage.snapshot.interval'` now return `Unknown setting name` instead of
+  `Coordinators don't support snapshots`. Update any tooling that pattern-matched
+  on the previous error message.
+  [#4066](https://github.com/memgraph/memgraph/pull/4066)
+
 ### Lab v3.11.0 - June 16th, 2026
 
 <LabReleasesClient version="3.11.0" />