diff --git a/qad/blockview/blockview.cpp b/qad/blockview/blockview.cpp
index e1932fb..793305d 100644
--- a/qad/blockview/blockview.cpp
+++ b/qad/blockview/blockview.cpp
@@ -317,6 +317,7 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 							wavetrace.setPreferredDirection(BlockViewWavetrace::Horizontal);
 						else
 							wavetrace.setPreferredDirection(BlockViewWavetrace::Vertical);
+						return true;
 					}
 				}
 			}
@@ -367,6 +368,7 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 						matchBus();
 					}
 				}
+				if (tmp_bus.isVisible()) return true;
 				if (mm_mods.testFlag(Qt::ShiftModifier)) {
 					if (fmm_drag) {
 						fmm_drag = false;