diff --git a/source/blender/blenkernel/intern/screen.c b/source/blender/blenkernel/intern/screen.c
index d0d63192ebf..2d59e978a81 100644
--- a/source/blender/blenkernel/intern/screen.c
+++ b/source/blender/blenkernel/intern/screen.c
@@ -467,7 +467,7 @@ static void panel_list_copy(ListBase *newlb, const ListBase *lb)
   Panel *panel = lb->first;
   for (; new_panel; new_panel = new_panel->next, panel = panel->next) {
     new_panel->activedata = NULL;
-    new_panel->runtime.custom_data_ptr = NULL;
+    memset(&new_panel->runtime, 0x0, sizeof(new_panel->runtime));
     panel_list_copy(&new_panel->children, &panel->children);
   }
 }
@@ -476,6 +476,8 @@ ARegion *BKE_area_region_copy(const SpaceType *st, const ARegion *region)
 {
   ARegion *newar = MEM_dupallocN(region);
 
+  memset(&newar->runtime, 0x0, sizeof(newar->runtime));
+
   newar->prev = newar->next = NULL;
   BLI_listbase_clear(&newar->handlers);
   BLI_listbase_clear(&newar->uiblocks);
@@ -1419,6 +1421,8 @@ static void direct_link_panel_list(BlendDataReader *reader, ListBase *lb)
 
 static void direct_link_region(BlendDataReader *reader, ARegion *region, int spacetype)
 {
+  memset(&region->runtime, 0x0, sizeof(region->runtime));
+
   direct_link_panel_list(reader, &region->panels);
 
   BLO_read_list(reader, &region->panels_category_active);
@@ -1560,16 +1564,15 @@ static void direct_link_area(BlendDataReader *reader, ScrArea *area)
 
     if (sl->spacetype == SPACE_VIEW3D) {
       View3D *v3d = (View3D *)sl;
+
+      memset(&v3d->runtime, 0x0, sizeof(v3d->runtime));
+
       if (v3d->gpd) {
         BLO_read_data_address(reader, &v3d->gpd);
         BKE_gpencil_blend_read_data(reader, v3d->gpd);
       }
       BLO_read_data_address(reader, &v3d->localvd);
 
-      /* Runtime data */
-      v3d->runtime.properties_storage = NULL;
-      v3d->runtime.flag = 0;
-
       /* render can be quite heavy, set to solid on load */
       if (v3d->shading.type == OB_RENDER) {
         v3d->shading.type = OB_SOLID;
@@ -1584,7 +1587,7 @@ static void direct_link_area(BlendDataReader *reader, ScrArea *area)
       SpaceGraph *sipo = (SpaceGraph *)sl;
 
       BLO_read_data_address(reader, &sipo->ads);
-      BLI_listbase_clear(&sipo->runtime.ghost_curves);
+      memset(&sipo->runtime, 0x0, sizeof(sipo->runtime));
     }
     else if (sl->spacetype == SPACE_NLA) {
       SpaceNla *snla = (SpaceNla *)sl;
@@ -1652,7 +1655,7 @@ static void direct_link_area(BlendDataReader *reader, ScrArea *area)
     }
     else if (sl->spacetype == SPACE_TEXT) {
       SpaceText *st = (SpaceText *)sl;
-      memset(&st->runtime, 0, sizeof(st->runtime));
+      memset(&st->runtime, 0x0, sizeof(st->runtime));
     }
     else if (sl->spacetype == SPACE_SEQ) {
       SpaceSeq *sseq = (SpaceSeq *)sl;
@@ -1724,6 +1727,11 @@ static void direct_link_area(BlendDataReader *reader, ScrArea *area)
       BLO_read_data_address(reader, &sfile->params);
       BLO_read_data_address(reader, &sfile->asset_params);
     }
+    else if (sl->spacetype == SPACE_ACTION) {
+      SpaceAction *saction = (SpaceAction *)sl;
+
+      memset(&saction->runtime, 0x0, sizeof(saction->runtime));
+    }
     else if (sl->spacetype == SPACE_CLIP) {
       SpaceClip *sclip = (SpaceClip *)sl;
 
diff --git a/source/blender/editors/space_action/space_action.c b/source/blender/editors/space_action/space_action.c
index f6af2f79890..26b087168f9 100644
--- a/source/blender/editors/space_action/space_action.c
+++ b/source/blender/editors/space_action/space_action.c
@@ -153,6 +153,8 @@ static SpaceLink *action_duplicate(SpaceLink *sl)
 {
   SpaceAction *sactionn = MEM_dupallocN(sl);
 
+  memset(&sactionn->runtime, 0x0, sizeof(sactionn->runtime));
+
   /* clear or remove stuff from old */
 
   return (SpaceLink *)sactionn;
diff --git a/source/blender/editors/space_graph/space_graph.c b/source/blender/editors/space_graph/space_graph.c
index 9f01773eadf..0c6d904de01 100644
--- a/source/blender/editors/space_graph/space_graph.c
+++ b/source/blender/editors/space_graph/space_graph.c
@@ -172,6 +172,8 @@ static SpaceLink *graph_duplicate(SpaceLink *sl)
 {
   SpaceGraph *sipon = MEM_dupallocN(sl);
 
+  memset(&sipon->runtime, 0x0, sizeof(sipon->runtime));
+
   /* clear or remove stuff from old */
   BLI_duplicatelist(&sipon->runtime.ghost_curves, &((SpaceGraph *)sl)->runtime.ghost_curves);
   sipon->ads = MEM_dupallocN(sipon->ads);
diff --git a/source/blender/editors/space_view3d/space_view3d.c b/source/blender/editors/space_view3d/space_view3d.c
index 001def7318e..36901141497 100644
--- a/source/blender/editors/space_view3d/space_view3d.c
+++ b/source/blender/editors/space_view3d/space_view3d.c
@@ -351,14 +351,13 @@ static SpaceLink *view3d_duplicate(SpaceLink *sl)
   View3D *v3do = (View3D *)sl;
   View3D *v3dn = MEM_dupallocN(sl);
 
+  memset(&v3dn->runtime, 0x0, sizeof(v3dn->runtime));
+
   /* clear or remove stuff from old */
 
   if (v3dn->localvd) {
     v3dn->localvd = NULL;
-    v3dn->runtime.properties_storage = NULL;
   }
-  /* Only one View3D is allowed to have this flag! */
-  v3dn->runtime.flag &= ~V3D_RUNTIME_XR_SESSION_ROOT;
 
   v3dn->local_collections_uuid = 0;
   v3dn->flag &= ~(V3D_LOCAL_COLLECTIONS | V3D_XR_SESSION_MIRROR);
@@ -373,8 +372,6 @@ static SpaceLink *view3d_duplicate(SpaceLink *sl)
 
   /* copy or clear inside new stuff */
 
-  v3dn->runtime.properties_storage = NULL;
-
   return (SpaceLink *)v3dn;
 }