When creating a custom pact link to send in an email the next step is to then select a template. However, the template then inserts the old default PACT link. As a user you have to notice this mistake and copy over the new custom PACT link. If you don't, you'll accidentally send the default PACT link instead of the custom one.

It would be a better experience if the template replaced the PACT link with the custom link you just created