Persistence in used collaborator strings

[Hipapheralkus]

When I receive some collaborator interactions, and gracefully exit Burp, I see them as persistent. However I would love to generate a Collaborator string which would be persistent between shutdowns of Burp. I've tried to generate payload using Taborator, turned off Burp Suite, and open it again. Only then I accessed Collaborator location and I've received no interaction. Even if there would be something like "Insert persistent collaborator payload" (new button), would it be possible to implement it? An example usecase is email functionality for 2FA. If I register my account on Collaborator string email address, I'd like to receive the interaction even when I turn off Burp and turn it back on. Alternatively, if there would be a way to "add strings" for polling (e.g. I know how my unique string looks like, so I'd add it to Taborator polls), it would fix my problem as well.