ENS App and Explorer are on the Sepolia testnet. Features may change before mainnet.
Names registered on Sepolia are test names. The Sepolia registry is reset periodically when a new version is deployed, and names registered before a reset stop appearing.
If your name has disappeared, this is expected — nothing is wrong with your wallet and nothing has been taken. You can register the name again on the current deployment.
Two things to know:
Your Ethereum Mainnet names are not affected. The two networks keep separate registries.
Sepolia names will not carry over to Ethereum Mainnet.