It's the redline from top right corner to the left down on the counterfoil and Yes it says the the document is valid until 2027 in mycic account.If you have a gckey account, you should be able to see the validity of the document (visa) by logging in. No GCMS notes needed to see if it's still valid.
Is this a red line throughout the entirety of the visa, or just a small part? There is a chance it could be just the pen they use to mark the primary inspection kiosk receipts, if the receipt was inside the passport.
Do you think we should request for counterfoil replacement? I will wait for a week to see if status gets changed online and then I will go with counterfoil replacement request if that's possible.