diff --git a/mobile/build.js b/mobile/build.js
index 41c1cbf..e52e68e 100644
--- a/mobile/build.js
+++ b/mobile/build.js
@@ -37,7 +37,16 @@ function copy(from, to) {
   fs.cpSync(from, to, { recursive: true });
 }
 
+// capacitor-nodejs baut seine Brückenbibliothek mit 4-KB-Seitenausrichtung; neuere Geräte (z. B. Pixel mit
+// 16-KB-Speicherseiten) laden sie dann nicht. Linker-Option einmalig ergänzen.
+function patchPlugin() {
+  const f = path.join(__dirname, 'node_modules', 'capacitor-nodejs', 'android', 'CMakeLists.txt');
+  const s = fs.readFileSync(f, 'utf8');
+  if (!s.includes('max-page-size=16384')) fs.writeFileSync(f, `${s}\ntarget_link_options(native-lib PRIVATE "-Wl,-z,max-page-size=16384")\n`);
+}
+
 function buildWeb() {
+  patchPlugin();
   fs.rmSync(WWW, { recursive: true, force: true });
   copy(path.join(__dirname, 'web'), WWW);
   const nm = path.join(ROOT, 'node_modules', '@xterm');
diff --git a/mobile/dev/electron-dev.js b/mobile/dev/electron-dev.js
index 670ef61..ab47576 100644
--- a/mobile/dev/electron-dev.js
+++ b/mobile/dev/electron-dev.js
@@ -26,8 +26,10 @@ ipcMain.on('dev:send', (_e, name, args) => fromWeb.emit(name, ...args));
 ipcMain.handle('dev:start', (_e, env) => {
   Object.assign(process.env, env, { DATADIR: bridge.getDataPath() });
   require('fs').mkdirSync(process.env.DATADIR, { recursive: true });
-  require(path.join(WWW, 'nodejs', 'index.js'));
+  setTimeout(() => { started = true; require(path.join(WWW, 'nodejs', 'index.js')); }, 500);
 });
+let started;
+ipcMain.handle('dev:ready', async () => { while (!started) await new Promise((r) => setTimeout(r, 100)); });
 ipcMain.handle('dev:native', (_e, method, arg) => {
   if (method === 'vaultKey') return { key: crypto.createHash('sha256').update(app.getPath('userData')).digest('base64') };
   if (method === 'info') return { device: 'Dev Phone', locale: process.env.MRTERM_DEV_LOCALE || 'en-US', version: require('../../package.json').version };
diff --git a/mobile/dev/preload.js b/mobile/dev/preload.js
index e5e13d4..1885e8e 100644
--- a/mobile/dev/preload.js
+++ b/mobile/dev/preload.js
@@ -6,7 +6,9 @@ const native = (m) => (arg) => ipcRenderer.invoke('dev:native', m, arg);
 
 contextBridge.exposeInMainWorld('DevBridge', {
   NodeJS: {
-    start: (o) => ipcRenderer.invoke('dev:start', o.env),
+    // Wie auf Android: start() kehrt erst zurück, wenn Node beendet wird
+    start: (o) => { ipcRenderer.invoke('dev:start', o.env); return new Promise(() => {}); },
+    whenReady: () => ipcRenderer.invoke('dev:ready'),
     send: ({ eventName, args }) => ipcRenderer.send('dev:send', eventName, args),
     addListener: (name, fn) => { if (!listeners.has(name)) listeners.set(name, new Set()); listeners.get(name).add(fn); return { remove: () => listeners.get(name).delete(fn) }; },
   },
diff --git a/mobile/web/app.js b/mobile/web/app.js
index c839cd4..5c042b2 100644
--- a/mobile/web/app.js
+++ b/mobile/web/app.js
@@ -22,10 +22,10 @@ const api = {
     return new Promise((resolve, reject) => {
       const id = ++seq;
       waits.set(id, { resolve, reject });
-      NodeJS.send({ eventName: 'call', args: [id, ch, args] });
+      Promise.resolve(NodeJS.send({ eventName: 'call', args: [id, ch, args] })).catch((e) => { waits.delete(id); reject(e); });
     });
   },
-  send(ch, ...args) { NodeJS.send({ eventName: 'send', args: [ch, args] }); },
+  send(ch, ...args) { NodeJS.send({ eventName: 'send', args: [ch, args] }).catch?.((e) => console.error(e)); },
   on(ch, fn) { if (!events.has(ch)) events.set(ch, new Set()); events.get(ch).add(fn); return () => events.get(ch).delete(fn); },
 };
 NodeJS.addListener('reply', ({ args: [id, ok, value] }) => {
@@ -174,10 +174,15 @@ async function boot() {
   const info = await Native.info().catch(() => ({ device: 'Android', locale: navigator.language, version: '0.0.0' }));
   S.info = info;
   I18N.setLanguage('auto', info.locale);
-  const ready = new Promise((r) => { const off = NodeJS.addListener('ready', () => r()); void off; });
+  const ready = new Promise((r) => NodeJS.addListener('ready', () => r(true)));
   const { key } = await Native.vaultKey();
-  await NodeJS.start({ env: { MRTERM_VAULT_KEY: key, MRTERM_DEVICE: info.device, MRTERM_LOCALE: info.locale, MRTERM_VERSION: info.version } });
-  await Promise.race([ready, new Promise((r) => setTimeout(r, 8000))]);
+  // start() kehrt erst zurück, wenn Node beendet wird – daher nicht darauf warten, sondern auf whenReady()
+  NodeJS.start({ env: { MRTERM_VAULT_KEY: key, MRTERM_DEVICE: info.device, MRTERM_LOCALE: info.locale, MRTERM_VERSION: info.version } })
+    .catch((e) => { if (!/already been started/.test(e.message)) bootError(`Node.js: ${e.message}`); });
+  const timeout = (ms, what) => new Promise((_, rej) => setTimeout(() => rej(new Error(what)), ms));
+  await Promise.race([whenReady(), timeout(30000, 'The Node.js engine did not start.')]);
+  // Backend meldet sich mit 'ready'; nach einem Neuladen der Oberfläche läuft es schon → Ping genügt
+  await Promise.race([ready, api.call('app:version'), timeout(20000, 'The MrTerm backend did not respond.')]);
   try { Object.assign(S.bio, await Native.bioAvailable()); } catch {}
   Native.multicast({ on: true }).catch(() => {});
   $('#boot').hidden = true;
@@ -1015,6 +1020,18 @@ window.mrtermBack = onBack; // wird von MainActivity bei der Zurück-Taste aufge
 // MainActivity meldet die Bildschirmtastatur (WebView wird dann um ihre Höhe verkleinert)
 window.mrtermIme = (open) => { document.body.classList.toggle('kbd-open', open); setTimeout(fitViewport, 50); };
 
-boot().catch((e) => {
-  $('#boot').innerHTML = `<div style="color:var(--red);padding:24px;text-align:center">${esc(e.message || e)}</div>`;
-});
+// whenReady() wartet, bis die Node-Engine Nachrichten annimmt (vorher lehnt send() ab)
+async function whenReady() {
+  for (;;) {
+    try { await NodeJS.whenReady(); return; } catch (e) {
+      if (!/not been started/.test(e.message)) throw e;
+      await new Promise((r) => setTimeout(r, 200));
+    }
+  }
+}
+function bootError(msg) {
+  const b = $('#boot');
+  if (b.hidden) return toast(msg, 'error');
+  b.innerHTML = `<img src="logo.png" alt=""/><div style="color:var(--red);padding:0 24px;text-align:center;max-width:420px">${esc(msg)}</div><div style="color:var(--muted);padding:0 24px;text-align:center;font-size:13px">Android ${esc(navigator.userAgent.match(/Android ([\d.]+)/)?.[1] || '')} · ${esc(S.info?.device || '')} · ${esc(S.info?.version || '')}</div>`;
+}
+boot().catch((e) => bootError(e.message || String(e)));