Wordpress Developer for Plugin Heavy Multisite

We have a WooCommerce store where customers with "unverified" account status are being logged out immediately after placing an order, instead of being redirected to the order confirmation page. Orders are creating successfully, but the session is being terminated. The issue appeared today and is isolated to unverified accounts only. Cache has been ruled out. The store uses 4 custom/third-party plugins for: login control, email verification, mobile OTP verification at checkout, and order confirmation routing. These plugins likely have conflicting session, hook, or redirect logic. We need a developer who can diagnose the conflict and then redesign the account creation and verification flow from scratch. Deliverables 1 Plugin conflict audit and fix Identify which plugin(s) are triggering logout or redirect conflicts post-order. Deliver a root cause write-up and apply the fix without breaking the remaining plugin logic. 2 Account creation flow redesign (core priority) No unverified accounts should exist in the system at any point. Redesign the registration-to-verification gate so that account creation is only finalized after email and/or mobile OTP is confirmed. Must block bots and human workarounds. 3 Checkout mobile OTP with number update logic During checkout, if a customer uses a new mobile number and completes OTP, that number should update on their account automatically. Must be stable across sessions. 4 End-to-end flow documentation Deliver a short written map of the final registration, verification, checkout, and order confirmation flow so it can be maintained without you.