Under the hood
Useful1 Signal2
A new marker records that a follow-up reminder already went out and renders nothing.
What's wrong with this entry?
Anonymous. No account, no email.
What
A new entry marking that a follow-up reminder was already sent produces no output, joining the existing do-nothing entries such as the one for a file already read.
Evidence
secondary_reminder_sent: () => [],
Strings lifted out of the shipped bundle, so the claim above can be checked against them.