pull down to refresh
Yea this sounds like you just created a new wallet account, the AI is partially correct, the funds are still part of Pub's assets... you just have a different wallet user (nsec) connected to it. Each source in a wallet is added with a unique nsec, so you could technically add the same source twice within the same wallet (for multiple lightning addresses for example)... when you removed it from the wallet it deleted the nsec from wallet, when you re-added it it created a new one.
The steps to reconcile will be similar to in the other thread, you can manually manipulate the Pub database user table.... there 0 the funds to the abandoned account and add them to the new account
Stop Pub
Take a backup for good measure
Delete the CSV file
Edit the user table with DB Browser for SQLite
Restart
Your funds are not lost, you simply lost access to it. As per good practice, by now anyone should have clear to always make a backup of your node or wallet. Did you? Well, good news becasue Lightning.pub does a backup for you and associate it to your nostr npub.
If not did you at least have a backup of your nostr nsec you created the wallet with?
Sounds like you running your own pub, just to double check: Did you use your own LN.pub or the default bootstrap one?
cc: @justin_shocknet