Fix T96054: Switching vertex group does not update display

Caused by 0f89bcdbebf5 and was not fully addressed by 6f9828289f39:
tagging an ID with flag 0 is to be seen as an explicit tag for copy
on write.

Would be nice to either consolidate code paths of flag 0 and explicit
component tag, or get rid of tagging with 0 flag, but that is above of
what we can do for the upcoming release.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/depsgraph/intern/depsgraph_tag.cc b/source/blender/depsgraph/intern/depsgraph_tag.cc
index 11074b5bf72..f8de6b4580c 100644
--- a/source/blender/depsgraph/intern/depsgraph_tag.cc
+++ b/source/blender/depsgraph/intern/depsgraph_tag.cc
@@ -499,6 +499,10 @@ void deg_graph_node_tag_zero(Main *bmain,
     if (comp_node->type == NodeType::ANIMATION) {
       continue;
     }
+    else if (comp_node->type == NodeType::COPY_ON_WRITE) {
+      id_node->is_cow_explicitly_tagged = true;
+    }
+
     comp_node->tag_update(graph, update_source);
   }
   deg_graph_id_tag_legacy_compat(bmain, graph, id, (IDRecalcFlag)0, update_source);