Hello, I have had the same issue.
A new cared was delivered to me. I used its number twice (once on amazon, once on a private transaction) and now I have received another Doordash active card check notification.
Block in app and request a new card. It’s likely compromised somehow.
As a tip, in the future, if you have plus, you can create a virtual card for this purpose, and use it, that way if its compromised you can delete it without affecting the physical card
Thank you. I just don’t understand how this could have happened in such a short time and with the same active checker—which doesn’t seem to have affected only me. I wonder how is Doordash being used in that regard.