diff --git a/libs/blockview/blockbusitem.cpp b/libs/blockview/blockbusitem.cpp
index df827b4..fc9d8ae 100644
--- a/libs/blockview/blockbusitem.cpp
+++ b/libs/blockview/blockbusitem.cpp
@@ -586,7 +586,10 @@ void BlockBusItem::mousePressEvent(QGraphicsSceneMouseEvent * e) {
 	if (!scene()->views().isEmpty()) {
 		bv = qobject_cast<BlockView*>(scene()->views().back());
 	}
-	if (bv) bv->cur_bus = this;
+	if (bv) {
+		if (selPoint >= 0 || selSegment >= 0)
+			bv->cur_bus = this;
+	}
 	if (new_segment) {
 		QMetaObject::invokeMethod(scene()->views().back(), "newBranchCancel");
 	}
diff --git a/libs/blockview/blockview.cpp b/libs/blockview/blockview.cpp
index 499688c..c4a1d34 100644
--- a/libs/blockview/blockview.cpp
+++ b/libs/blockview/blockview.cpp
@@ -231,7 +231,7 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 				block_emit_selection = false;
 				emit selectionChanged();
 			}
-			//qDebug() << cur_bus;
+			//qDebug() << "cur_bus" << cur_bus;
 			if (cur_bus) {
 				return false;
 			}
@@ -271,7 +271,7 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 				return true;
 			}
 			mil = scene_->items(scene_point);
-			//qDebug() << mil;
+			//qDebug() << "mil" << mil;
 			while (!mil.isEmpty()) {
 				mm_ci = mil.front();
 				if (mm_ci->data(bvidDTHandle).toBool()) return QGraphicsView::eventFilter(o, e);
@@ -358,9 +358,11 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 			/*if (ghost_) {
 				ghost_->setPos(quantize(me->scenePos(), grid_step));
 			}*/
+			//qDebug() << "move cur_bus" << cur_bus;
 			if (cur_bus) {
 				return false;
 			}
+			//qDebug() << "move mm_ci" << mm_ci;
 			if (mm_ci)
 				if (mm_ci->data(bvidTmpItem).toBool()) {
 					mm_ci = 0;
@@ -447,6 +449,7 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 						setCursor(Qt::DragCopyCursor);
 					}
 				} else {
+					//qDebug() << "move smode" << smode;
 					if (smode == BlockView::SingleSelection) {
 						if (fmm_drag) {
 							clearSelection();
@@ -2096,6 +2099,10 @@ void BlockView::removeAll() {
 	last_multiconnect_pl.clear();
 	QList<QGraphicsItem*> gi = scene_->items(), ai;
 	blockSignals(true);
+	match_bus = bus_from = cur_bus = nullptr;
+	mm_ci = nullptr;
+	hpin = nullptr;
+	ghost_ = nullptr;
 	foreach (QGraphicsItem * i, gi) {
 		if (i->data(bvidTmpItem).toBool()) continue;
 		if (i->data(bvidType).toInt() == bvitBlock)