🔧 I can't believe this helps

atom/browser/native_window.cc

@@ -117,6 +117,14 @@ void NativeWindow::InitFromOptions(const mate::Dictionary& options) {
   bool center;
   if (options.Get(options::kX, &x) && options.Get(options::kY, &y)) {
     SetPosition(gfx::Point(x, y));
+
+#if DEFINEED(OS_WIN)
+    // Dirty, dirty workaround for
+    // https://github.com/electron/electron/issues/10862
+    // Somehow, we need to call `SetBounds` twice to get
+    // usable results. The root cause is still unknown.
+    SetPosition(gfx::Point(x, y));
+#endif
   } else if (options.Get(options::kCenter, &center) && center) {
     Center();
   }