Campaign subject showing Wrong data

[Rubyat13]

Client ticket ID: 45160
Client Email: henryk@kenyageographic.com

Issue: Campaign subject showing Wrong data. Screenshot: https://d.pr/i/0Hg1UZ
Test result: After thorough testing, I’ve found that the test email displays the correct data, whereas the actual campaign shows inaccurate data. Screenshot: https://d.pr/i/0Hg1UZ

Issue reproduce steps:
Create a campaign and send it to a subscriber list. (to reproduce on client site open client ticket to client site login credentials)