diff --git a/src/ai/ai_gui.cpp b/src/ai/ai_gui.cpp
--- a/src/ai/ai_gui.cpp
+++ b/src/ai/ai_gui.cpp
@@ -1341,10 +1341,6 @@ struct AIDebugWindow : public QueryStrin
 	{
 		EventState state = ES_NOT_HANDLED;
 		switch (this->HandleEditBoxKey(WID_AID_BREAK_STR_EDIT_BOX, key, keycode, state)) {
-			case HEBR_EDITING:
-				this->OnOSKInput(WID_AID_BREAK_STR_EDIT_BOX);
-				break;
-
 			case HEBR_CANCEL:
 				/* Unfocus the text box. */
 				this->UnfocusFocusedWidget();
diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -697,7 +697,7 @@ struct GenerateLandscapeWindow : public 
 	virtual EventState OnKeyPress(uint16 key, uint16 keycode)
 	{
 		EventState state = ES_NOT_HANDLED;
-		if (this->HandleEditBoxKey(WID_GL_RANDOM_EDITBOX, key, keycode, state) == HEBR_EDITING) this->OnOSKInput(WID_GL_RANDOM_EDITBOX);
+		this->HandleEditBoxKey(WID_GL_RANDOM_EDITBOX, key, keycode, state);
 		return state;
 	}
 
diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -757,6 +757,9 @@ HandleEditBoxResult QueryString::HandleE
 			}
 	}
 
+	Window *osk = FindWindowById(WC_OSK, 0);
+	if (osk != NULL && osk->parent == w) osk->InvalidateData();
+
 	return HEBR_EDITING;
 }
 
@@ -810,7 +813,15 @@ void QueryString::DrawEditBox(const Wind
 
 HandleEditBoxResult QueryStringBaseWindow::HandleEditBoxKey(int wid, uint16 key, uint16 keycode, EventState &state)
 {
-	return this->QueryString::HandleEditBoxKey(this, wid, key, keycode, state);
+	HandleEditBoxResult result = this->QueryString::HandleEditBoxKey(this, wid, key, keycode, state);
+	switch (result) {
+		case HEBR_EDITING:
+			this->OnOSKInput(wid);
+			break;
+
+		default: break;
+	}
+	return result;
 }
 
 void QueryStringBaseWindow::OnOpenOSKWindow(int wid)
@@ -898,16 +909,10 @@ struct QueryStringWindow : public QueryS
 	{
 		EventState state = ES_NOT_HANDLED;
 		switch (this->HandleEditBoxKey(WID_QS_TEXT, key, keycode, state)) {
-			default: NOT_REACHED();
-			case HEBR_EDITING: {
-				Window *osk = FindWindowById(WC_OSK, 0);
-				if (osk != NULL && osk->parent == this) osk->InvalidateData();
-				break;
-			}
+			default: break;
 			case HEBR_CONFIRM: this->OnOk();
 				/* FALL THROUGH */
 			case HEBR_CANCEL: delete this; break; // close window, abandon changes
-			case HEBR_NOT_FOCUSED: break;
 		}
 		return state;
 	}
diff --git a/src/network/network_chat_gui.cpp b/src/network/network_chat_gui.cpp
--- a/src/network/network_chat_gui.cpp
+++ b/src/network/network_chat_gui.cpp
@@ -511,17 +511,11 @@ struct NetworkChatWindow : public QueryS
 		} else {
 			_chat_tab_completion_active = false;
 			switch (this->HandleEditBoxKey(WID_NC_TEXTBOX, key, keycode, state)) {
-				default: NOT_REACHED();
-				case HEBR_EDITING: {
-					Window *osk = FindWindowById(WC_OSK, 0);
-					if (osk != NULL && osk->parent == this) osk->InvalidateData();
-					break;
-				}
+				default: break;
 				case HEBR_CONFIRM:
 					SendChat(this->text.buf, this->dtype, this->dest);
 					/* FALL THROUGH */
 				case HEBR_CANCEL: delete this; break;
-				case HEBR_NOT_FOCUSED: break;
 			}
 		}
 		return state;
diff --git a/src/network/network_content_gui.cpp b/src/network/network_content_gui.cpp
--- a/src/network/network_content_gui.cpp
+++ b/src/network/network_content_gui.cpp
@@ -766,10 +766,7 @@ public:
 			default: {
 				/* Handle editbox input */
 				EventState state = ES_NOT_HANDLED;
-				if (this->HandleEditBoxKey(WID_NCL_FILTER, key, keycode, state) == HEBR_EDITING) {
-					this->OnOSKInput(WID_NCL_FILTER);
-				}
-
+				this->HandleEditBoxKey(WID_NCL_FILTER, key, keycode, state);
 				return state;
 			}
 		}
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -847,11 +847,7 @@ public:
 				}
 				break;
 
-			case HEBR_CONFIRM:
-				break;
-
 			default:
-				this->OnOSKInput(WID_NG_CLIENT);
 				break;
 		}
 
@@ -1184,16 +1180,7 @@ struct NetworkStartServerWindow : public
 	virtual EventState OnKeyPress(uint16 key, uint16 keycode)
 	{
 		EventState state = ES_NOT_HANDLED;
-		switch (this->HandleEditBoxKey(WID_NSS_GAMENAME, key, keycode, state)) {
-			case HEBR_CONFIRM:
-			case HEBR_NOT_FOCUSED:
-				break;
-
-			default:
-				this->OnOSKInput(WID_NSS_GAMENAME);
-				break;
-		}
-
+		this->HandleEditBoxKey(WID_NSS_GAMENAME, key, keycode, state);
 		return state;
 	}
 
diff --git a/src/newgrf_gui.cpp b/src/newgrf_gui.cpp
--- a/src/newgrf_gui.cpp
+++ b/src/newgrf_gui.cpp
@@ -1265,9 +1265,7 @@ struct NewGRFWindow : public QueryString
 			default: {
 				/* Handle editbox input */
 				EventState state = ES_NOT_HANDLED;
-				if (this->HandleEditBoxKey(WID_NS_FILTER, key, keycode, state) == HEBR_EDITING) {
-					this->OnOSKInput(WID_NS_FILTER);
-				}
+				this->HandleEditBoxKey(WID_NS_FILTER, key, keycode, state);
 				return state;
 			}
 		}
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -2410,9 +2410,7 @@ struct GameSettingsWindow : QueryStringB
 	{
 		/* Handle editbox input */
 		EventState state = ES_NOT_HANDLED;
-		if (this->HandleEditBoxKey(WID_GS_FILTER, key, keycode, state) == HEBR_EDITING) {
-			this->OnOSKInput(WID_GS_FILTER);
-		}
+		this->HandleEditBoxKey(WID_GS_FILTER, key, keycode, state);
 		return state;
 	}
 
diff --git a/src/signs_gui.cpp b/src/signs_gui.cpp
--- a/src/signs_gui.cpp
+++ b/src/signs_gui.cpp
@@ -297,10 +297,6 @@ struct SignListWindow : QueryStringBaseW
 	{
 		EventState state = ES_NOT_HANDLED;
 		switch (this->HandleEditBoxKey(WID_SIL_FILTER_TEXT, key, keycode, state)) {
-			case HEBR_EDITING:
-				this->OnOSKInput(WID_SIL_FILTER_TEXT);
-				break;
-
 			case HEBR_CONFIRM: // Enter pressed -> goto first sign in list
 				if (this->signs.Length() >= 1) {
 					const Sign *si = this->signs[0];
@@ -322,7 +318,7 @@ struct SignListWindow : QueryStringBaseW
 				break;
 
 			default:
-				NOT_REACHED();
+				break;
 		}
 
 		return state;