diff --git a/include/xwayland.h b/include/xwayland.h
index 0072106e..99867e3e 100644
--- a/include/xwayland.h
+++ b/include/xwayland.h
@@ -95,5 +95,7 @@ void xwayland_adjust_usable_area(struct view *view,
 
 void xwayland_update_workarea(struct server *server);
 
+void xwayland_reset_cursor(struct server *server);
+
 #endif /* HAVE_XWAYLAND */
 #endif /* LABWC_XWAYLAND_H */
diff --git a/src/input/cursor.c b/src/input/cursor.c
index 975a295e..3e3c0003 100644
--- a/src/input/cursor.c
+++ b/src/input/cursor.c
@@ -26,6 +26,7 @@
 #include "resistance.h"
 #include "ssd.h"
 #include "view.h"
+#include "xwayland.h"
 
 #define LAB_CURSOR_SHAPE_V1_VERSION 1
 
@@ -1403,6 +1404,9 @@ void
 cursor_reload(struct seat *seat)
 {
 	cursor_load(seat);
+#if HAVE_XWAYLAND
+	xwayland_reset_cursor(seat->server);
+#endif
 	cursor_update_image(seat);
 }
 
diff --git a/src/xwayland.c b/src/xwayland.c
index 2e537038..d4eff83d 100644
--- a/src/xwayland.c
+++ b/src/xwayland.c
@@ -1128,6 +1128,56 @@ xwayland_adjust_stacking_order(struct server *server)
 	wl_array_release(&views);
 }
 
+void
+xwayland_reset_cursor(struct server *server)
+{
+	/*
+	 * As xwayland caches the pixel data when not yet started up
+	 * due to the delayed lazy startup approach, we do have to
+	 * re-set the xwayland cursor image. Otherwise the first X11
+	 * client connected will cause the xwayland server to use
+	 * the cached (and potentially destroyed) pixel data.
+	 *
+	 * Calling this function after reloading the cursor theme
+	 * ensures that the cached pixel data keeps being valid.
+	 *
+	 * To reproduce:
+	 * - Compile with b_sanitize=address,undefined
+	 * - Start labwc (nothing in autostart that could create
+	 *   a X11 connection, e.g. no GTK or X11 application)
+	 * - Reconfigure
+	 * - Start some X11 client
+	 */
+
+	if (!server->xwayland) {
+		return;
+	}
+
+	struct wlr_xcursor *xcursor = wlr_xcursor_manager_get_xcursor(
+		server->seat.xcursor_manager, XCURSOR_DEFAULT, 1);
+
+	if (xcursor && !server->xwayland->xwm) {
+		/* Prevents setting the cursor on an active xwayland server */
+		struct wlr_xcursor_image *image = xcursor->images[0];
+		wlr_xwayland_set_cursor(server->xwayland, image->buffer,
+			image->width * 4, image->width,
+			image->height, image->hotspot_x,
+			image->hotspot_y);
+		return;
+	}
+
+	if (server->xwayland->cursor) {
+		/*
+		 * The previous configured theme has set the
+		 * default cursor or the xwayland server is
+		 * currently running but still has a cached
+		 * xcursor set that will be used on the next
+		 * xwayland destroy -> lazy startup cycle.
+		 */
+		zfree(server->xwayland->cursor);
+	}
+}
+
 void
 xwayland_server_finish(struct server *server)
 {