Depsgraph: Fix unwanted node tree copy-over

Was caused by two things from the past:

- Tagging would set id->recalc to COW update flag.
  This one is to be ignored.

- Particle tagging will use psys recalc flags on id->recalc,
  but we only need to use flags from particles. Otherwise
  it will be some collisions in bit masks.

source/blender/depsgraph/intern/depsgraph_tag.cc

@@ -410,7 +410,7 @@ void deg_graph_id_tag_update(Main *bmain, Depsgraph *graph, ID *id, int flag)
 		}
 		deg_graph_id_tag_legacy_compat(bmain, id, (eDepsgraph_Tag)0);
 	}
-	id->recalc |= flag;
+	id->recalc |= (flag & PSYS_RECALC);
 	int current_flag = flag;
 	while (current_flag != 0) {
 		eDepsgraph_Tag tag =

source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc

@@ -649,7 +649,9 @@ ID *deg_update_copy_on_write_datablock(const Depsgraph *depsgraph,
 				 * everything is done by node tree update function which
 				 * only copies socket values.
 				 */
-				const int ignore_flag = (ID_RECALC_DRAW | ID_RECALC_ANIMATION);
+				const int ignore_flag = (ID_RECALC_DRAW |
+				                         ID_RECALC_ANIMATION |
+				                         ID_RECALC_COPY_ON_WRITE);
 				if ((id_cow->recalc & ~ignore_flag) == 0) {
 					return id_cow;
 				}

source/blender/makesdna/DNA_ID.h

@@ -460,6 +460,7 @@ enum {
 	LIB_TAG_NOT_ALLOCATED     = 1 << 16,
 };
 
+/* WARNING - when adding flags check on PSYS_RECALC */
 enum {
 	/* RESET_AFTER_USE, used by update code (depsgraph). */
 	ID_RECALC_NONE  = 0,