From 64719456ab5e1382ebc22b6306cad1b0b4727aa6 Mon Sep 17 00:00:00 2001
From: Renzo Delfino <75499398+R-Delfino95@users.noreply.github.com>
Date: Wed, 29 Apr 2026 13:47:33 -0300
Subject: [PATCH 1/2] fix(mux-video): bail out of #requestLoad() when not yet
 connected

---
 packages/mux-video/src/base.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/packages/mux-video/src/base.ts b/packages/mux-video/src/base.ts
index 1c9ac9e0..fa5ec044 100644
--- a/packages/mux-video/src/base.ts
+++ b/packages/mux-video/src/base.ts
@@ -796,6 +796,14 @@ export class MuxVideoBaseElement extends CustomVideoElement implements IMuxVideo
     if (this.#loadRequested) return;
     await (this.#loadRequested = Promise.resolve());
     this.#loadRequested = null;
+    // Defer load() until the element is connected to the document. A parent
+    // custom element (e.g. <mux-player>) propagates `metadata-*` attributes via
+    // its own connectedCallback, which fires before this element's
+    // connectedCallback in tree order. Without this guard, an `await` between
+    // setAttribute and appendChild lets load() — and thus the first Mux Data
+    // beacon — fire with empty metadata. The connectedCallback re-invokes
+    // #requestLoad() once we're connected.
+    if (!this.isConnected) return;
     this.load();
   }
 

From 5ebec4a77ab9f0e63b51a414b52dab805d24d402 Mon Sep 17 00:00:00 2001
From: Renzo Delfino <75499398+R-Delfino95@users.noreply.github.com>
Date: Wed, 29 Apr 2026 15:36:11 -0300
Subject: [PATCH 2/2] fix(mux-video): skip disable-tracking unload/reload when
 disconnected

---
 packages/mux-video/src/base.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/mux-video/src/base.ts b/packages/mux-video/src/base.ts
index eac590aa..5ff151a9 100644
--- a/packages/mux-video/src/base.ts
+++ b/packages/mux-video/src/base.ts
@@ -959,6 +959,10 @@ export class MuxVideoBaseElement extends CustomVideoElement implements IMuxVideo
         break;
       case Attributes.DISABLE_TRACKING: {
         if (newValue == null || newValue !== oldValue) {
+          // Skip unload/reload when disconnected: #requestLoad() bails on !isConnected,
+          // so the .then() would fire without a corresponding load(). connectedCallback
+          // will trigger #requestLoad() with the updated tracking setting when connected.
+          if (!this.isConnected) break;
           const currentTime = this.currentTime;
           const paused = this.paused;
           this.unload();