Urgent WordPress Bug Fix Needed

**Title:** WordPress + Elementor: Every page shows blog content instead of its actual page (URL is correct, content is wrong)

**Description:**

There's an urgent bug on a WordPress site where every internal page (Work, Case Studies, AI Automation, Team, Careers, etc.) shows the same blog post/blog content instead of rendering its actual Elementor page. The URL in the browser is correct, but the content loaded is wrong. Only the homepage works correctly.

**Additional symptoms:**
- "Edit with Elementor" gets stuck on the loading screen
- Browser console error: `SecurityError: Failed to read a named property 'elementorFrontend' from 'Window' — Blocked a frame with origin from accessing a cross-origin frame`
- Rank Math SEO warning: "Site URL has changed since you connected"

**Already tried (none of these fixed it):**
- LiteSpeed Cache purge + plugin deactivation
- Permalinks flush (Settings > Permalinks > Save)
- Elementor CSS regeneration
- Checked Reading settings (Homepage/Posts page are correct)
- Checked General settings URL (correct)
- Changed the page slug and tested — same issue on the new slug too
- No custom templates set in Elementor Theme Builder

**Site details:**
- WordPress 7.0.1, Elementor (free) 4.2.1, Astra theme (free)
- Hosting: Hostinger
- Active plugins: Rank Math SEO, WPForms, LiteSpeed Cache, Essential Addons, ElementsKit, Royal Addons, UAE (Ultimate Addons for Elementor), WP Mail SMTP, UpdraftPlus, Premium Addons, WP Social

**Requirement:**
Need the root cause diagnosed and a permanent fix — whether it's WordPress rewrite rules, a database issue (siteurl/home mismatch), or a plugin conflict, whatever the actual cause turns out to be. A temporary or cache-based patch is not acceptable.

**Access available:** Hostinger File Manager, phpMyAdmin, WP Admin