Partial fix for #36024, don't always reset the node editor tree pointer if the type is undefined. This can happen if the tree type is defined by addon or script, in which case the tree type would be unknown the first time the context is checked, but registered right afterward. Also unknown tree types are handled fine, they just display dummy nodes in red warning color.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/editors/space_node/node_edit.c b/source/blender/editors/space_node/node_edit.c
index e10cba43d71..f8166456a2c 100644
--- a/source/blender/editors/space_node/node_edit.c
+++ b/source/blender/editors/space_node/node_edit.c
@@ -577,9 +577,10 @@ void snode_set_context(const bContext *C)
 	if (!treetype ||
 	    (treetype->poll && !treetype->poll(C, treetype)))
 	{
-		/* invalid tree type, disable */
-		snode->tree_idname[0] = '\0';
-		ED_node_tree_start(snode, NULL, NULL, NULL);
+		/* invalid tree type, skip
+		 * NB: not resetting the node path here, invalid bNodeTreeType
+		 * may still be registered at a later point.
+		 */
 		return;
 	}