before shadow2DArray try

src/core/scene/globject.cpp

@@ -634,6 +634,7 @@ ObjectBase * Light::clone(bool withChildren) {
 	o->decay_linear    = decay_linear;
 	o->decay_quadratic = decay_quadratic;
 	o->meta            = meta;
+	o->shadow_map.reinit();
 	return o;
 }
 

src/core/scene/glscene.cpp

@@ -113,6 +113,10 @@ void Scene::reinitAll() {
 		i->reinit();
 	for (auto * i: td_geometries)
 		i->reinit();
+	auto aol = root_->children(true);
+	for (auto * i: aol) {
+		if (i->type() == ObjectBase::glLight) ((Light *)i)->shadow_map.reinit();
+	}
 	setTreeChanged();
 	mat_changed = lights_changed = true;
 	need_reload_materials        = true;