Header removals wait for the code editor to be left: autosave saves with drop=false, so follow_header adds and renames from the header but keeps a port or setting whose parameter is gone, and leaving the editor (blur or closing the panel) saves once more with removals; source saves of a flow run one at a time

backend/fluksio/api/routes/flows.py

@@ -674,7 +674,7 @@ def read_node_source(
 
 
 def _follow_header(
-    controller: FlowController, name: str, node_id: str, code: str
+    controller: FlowController, name: str, node_id: str, code: str, drop: bool
 ) -> FlowDef | None:
     """Bring a function node's ports and settings in line with its header.
 
@@ -694,7 +694,7 @@ def _follow_header(
         or definition.origin
     ):
         return None
-    followed = follow_header(node, code)
+    followed = follow_header(node, code, drop)
     if followed == node:
         return None
     definition.nodes = [followed if n.id == node_id else n for n in definition.nodes]
@@ -716,6 +716,7 @@ async def save_node_source(
     source: NodeSource,
     controller: FlowControllerDep,
     user: CurrentUser,
+    drop: bool = True,
 ) -> Any:
     """Save a node's source as an unpublished edit and report whether it loads.
 
@@ -730,7 +731,9 @@ async def save_node_source(
 
     A node with its own code takes its input ports and settings from the
     header of ``process`` (see `follow_header`), and the answer carries the
-    node when that changed it.
+    node when that changed it. ``drop=false`` is the editor's autosave, which
+    adds and renames from the header but keeps what it no longer names until
+    the editor is left.
     """
     definition = _read_flow(controller, name)
     ref = _source_ref(definition, node_id)
@@ -746,7 +749,7 @@ async def save_node_source(
             controller.store.write_node_source, name, node_id, source.code, True
         )
     followed = await run_in_threadpool(
-        _follow_header, controller, name, node_id, source.code
+        _follow_header, controller, name, node_id, source.code, drop
     )
     node_def = next((n for n in definition.nodes if n.id == node_id), None)
     device = (