Issue with Receiving Emails Post Latest Update

Hello,

I use Gmail API as I have Google Workspace account to send emails both to customers as well myself. After the latest update, some mails are missing out. I have setup to receive new order email as well out of stock notification to my gmail account. In case both the emails are triggered, I receive only one. Either it will be new order email or product out of stock email.

In email logs it is showing status as sent and All good, mail sent as solution for all emails sent, even the ones I didn’t receive. In my Google Workspace email, I can see that all emails are showing up in sent folder. But when both mails are triggered, I am only receiving one of them.

Below is diagnostic report

Mailer: postsmtp
HostName: oldbookdepot.in
cURL Version: 7.52.1
OpenSSL Version: OpenSSL/1.0.2u
OS: Linux 629587.cloudwaysapps.com 4.9.0-16-amd64 #1 SMP Debian 4.9.272-1 (2021-06-21) x86_64
PHP: Linux 7.3.33-2+0~20220614.96+debian9~1.gbpe53774 en_US.UTF-8
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 6.0 en_US UTF-8
WordPress Theme: Bookshop
WordPress Plugins: WooCommerce added to cart popup (Ajax), Allow Multiple Accounts, Autoptimize, Breeze, Code Snippets, Data Analytics for PWA, Disable Cart Fragments, Easy Theme and Plugin Upgrades, Free Shipping Badge, Frontend Product Editor, Heartbeat Control by WP Rocket, WPCode - Insert Headers, Footers, and Code Snippets, Kadence WooCommerce Email Designer, Loading Icon Library for PWA, Login No Captcha reCAPTCHA (Google), Missed Scheduled Posts Publisher, Mobile Assistant Connector, Perfect Brands for WooCommerce, Post SMTP, Product Tabs Manager for WooCommerce, Pull to Refresh for PWA, PWA for WP, PWA Pro Extension Manager, PWA to APK Plugin, Qty Increment Buttons for WooCommerce, Quick Action for PWA, Really Simple SSL, Shipping Phone, Storefront Powerpack, Theme Customisations, User Switching, WooCommerce No Shipping Message, WooCommerce Smart COD, Woo Align Buttons, Woo Empty Cart Button, WooCommerce - Instamojo, Product Feed PRO for WooCommerce, Razorpay for WooCommerce, Woocommerce Single Product Page Customizer, Abandoned Cart Lite for WooCommerce, WooCommerce Checkout Field Editor, WooCommerce Conditional Shipping and Payments, Pixel Manager for WooCommerce, WooCommerce Mix and Match Products, WooCommerce Order Delivery, WooCommerce Product Bundles, WooCommerce Product Stock Alert, WOOF - WooCommerce Products Filter, WooCommerce, Yoast SEO, WP Google Analytics, WPC Variations Radio Buttons for WooCommerce
WordPress wp_mail Owner: /home/629587.cloudwaysapps.com/umdjdbbjpu/public_html/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress phpmailer_init Action(s): WC_Email_New_Order->handle_multipart, WC_Email_Cancelled_Order->handle_multipart, WC_Email_Failed_Order->handle_multipart, WC_Email_Customer_On_Hold_Order->handle_multipart, WC_Email_Customer_Processing_Order->handle_multipart, WC_Email_Customer_Completed_Order->handle_multipart, WC_Email_Customer_Refunded_Order->handle_multipart, WC_Email_Customer_Invoice->handle_multipart, WC_Email_Customer_Note->handle_multipart, WC_Email_Customer_Reset_Password->handle_multipart, WC_Email_Customer_New_Account->handle_multipart, WC_Admin_Email_Stock_Alert->handle_multipart, WC_Subscriber_Confirmation_Email_Stock_Alert->handle_multipart, WC_Email_Stock_Alert->handle_multipart
Postman: 2.1.3
Postman Sender Domain (Envelope|Message): oldbookdepot.in | oldbookdepot.in
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: Gmail API (https:plain://www.googleapis.com:443)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 80370 | 198