=== modified file 'Onboard/Keyboard.py'
--- Onboard/Keyboard.py	2016-08-15 15:08:44 +0000
+++ Onboard/Keyboard.py	2016-12-08 18:20:46 +0000
@@ -790,6 +790,9 @@
                 return visible
 
     def set_visible(self, visible):
+        if not visible:
+            self.release_pressed_keys(redraw=True, unsticky_only=True)
+
         self.update_auto_show_on_visibility_change(visible)
         for view in self._layout_views:
             view.set_visible(visible)
@@ -2247,7 +2250,7 @@
                 if key in self._locked_sticky_keys:
                     self._locked_sticky_keys.remove(key)
 
-    def release_pressed_keys(self, redraw=False):
+    def release_pressed_keys(self, redraw=False, unsticky_only=False):
         """
         Release pressed keys on exit, or when recreating the main window.
         """
@@ -2259,6 +2262,9 @@
 
         # Release keys that haven't been released yet
         for key in self.iter_keys():
+            if unsticky_only and key.sticky:
+                continue
+
             if key.pressed and key.type in \
                 [KeyCommon.CHAR_TYPE,
                  KeyCommon.KEYSYM_TYPE,