Hi Amit, thank you for sparing time looking into this issue.
I've tried re-open or re-create the delivery but with no luck to solve this problem.
For the issue I mentioned. The un-expected label is generated because the same link is once set in an old delivery template.
E.g. When I set the label of "https://www.abc.com" in delivery "A" as "Test", and then create a delivery "B" to include the same URL several days later. This link's label will automatically generate as "Test" no matter what I set in the HTML of delivery "B".
So, my question is, is there any method to avoid delivery "A" labels continuing taking effect in other new deliveries?