diff --git a/platform/linuxbsd/x11/display_server_x11.cpp b/platform/linuxbsd/x11/display_server_x11.cpp
index 2c07acf94f73..bc9f01287ee9 100644
--- a/platform/linuxbsd/x11/display_server_x11.cpp
+++ b/platform/linuxbsd/x11/display_server_x11.cpp
@@ -4683,6 +4683,7 @@ void DisplayServerX11::process_events() {
 				}
 				wd.focused = false;
 
+				last_button_state = 0;
 				Input::get_singleton()->release_pressed_events();
 				_send_window_event(wd, WINDOW_EVENT_FOCUS_OUT);
 
diff --git a/platform/macos/display_server_macos.mm b/platform/macos/display_server_macos.mm
index db71c48eff38..b43463fc63fb 100644
--- a/platform/macos/display_server_macos.mm
+++ b/platform/macos/display_server_macos.mm
@@ -655,6 +655,7 @@
 
 void DisplayServerMacOS::release_pressed_events() {
 	_THREAD_SAFE_METHOD_
+	last_button_state = 0;
 	if (Input::get_singleton()) {
 		Input::get_singleton()->release_pressed_events();
 	}
diff --git a/platform/windows/display_server_windows.cpp b/platform/windows/display_server_windows.cpp
index 03584977febf..270f821e6f16 100644
--- a/platform/windows/display_server_windows.cpp
+++ b/platform/windows/display_server_windows.cpp
@@ -4893,6 +4893,7 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
 void DisplayServerWindows::_process_activate_event(WindowID p_window_id) {
 	WindowData &wd = windows[p_window_id];
 	if (wd.activate_state == WA_ACTIVE || wd.activate_state == WA_CLICKACTIVE) {
+		last_button_state = 0;
 		last_focused_window = p_window_id;
 		alt_mem = false;
 		control_mem = false;
@@ -4905,6 +4906,7 @@ void DisplayServerWindows::_process_activate_event(WindowID p_window_id) {
 		wd.window_focused = true;
 		_send_window_event(wd, WINDOW_EVENT_FOCUS_IN);
 	} else { // WM_INACTIVE.
+		last_button_state = 0;
 		Input::get_singleton()->release_pressed_events();
 		track_mouse_leave_event(wd.hWnd);
 		// Release capture unconditionally because it can be set due to dragging, in addition to captured mode.