Dont remember who recommend the tip to crop only the QR code part to submit but thank you so much, that's a god sent advice!!
I literally got accepted right away. The pass was sent to my email in the same minute with the registration receipt email lol!!
Highly recommend this tip!!! Especially for anyone who got two doses from two different locations. (got my first in Thailand and second in UK.)
TLDR : Answer Summary
A user shared that cropping only the QR code portion of their vaccination certificate significantly expedited their approval process for the Thailand Pass, receiving their pass almost immediately after submission. Other users discussed various aspects of the submission process, such as the sources of their QR codes, potential issues with the UK NHS app, and tips to ensure successful document uploads. A consensus emerged about the importance of providing all necessary documents and avoiding leaving any fields blank when submitting vaccine details.