docs: one more known issue.

docs/changelog.rst

@@ -88,10 +88,10 @@ Mitogen for Ansible
 * *Module Replacer* style Ansible modules are not supported.
 
 * Actions are single-threaded for each `(host, user account)` combination,
-  including actions that execute on the local machine. Certain styles of
+  including actions that execute on the local machine. Playbooks may experience
-  playbook may experience slowdown compared to vanilla Ansible if they employ
+  slowdown compared to vanilla Ansible if they employ long-running
-  long-running ``local_action`` or ``delegate_to`` tasks delegating many target
+  ``local_action`` or ``delegate_to`` tasks delegating many target hosts to a
-  hosts to a single machine and user account.
+  single machine and user account.
 
 * Connection Delegation remains in preview and has bugs around how it infers
   connections. Connection establishment will remain single-threaded for the 0.2
@@ -99,8 +99,13 @@ Mitogen for Ansible
   release.
 
 * Connection Delegation does not support automatic tunnelling of SSH-dependent
-  actions, such as the ``synchronize`` module. This will be added in the 0.3
+  actions, such as the ``synchronize`` module. This will be addressed in the
-  series.
+  0.3 series.
+
+* Configurations will break that rely on the `hashbang argument splitting
+  behaviour <https://github.com/ansible/ansible/issues/15635>`_ of the
+  ``ansible_python_interpreter`` setting, contrary to the Ansible
+  documentation. This will be addressed in a future 0.2 release.
 
 
 Core Library