Sudden change to deployed address for any contract

I have been using the proxydeploy.js to deploy upgradeable test contract on rinkeby network via hardhat on vscode. Every time, i deploy a new contract, it will generate a new address, which totally makes sense. However, since yesterday, all the new contracts deployed are under this single address: 0x9fE46736679d2D9a65F0992F2272dE9f3c7fa6e0

This is quite puzzling as this address seems to be an existing address on rinkeby for years...How could this happen?

Oh, my mistake. Forgot to add --network rinkeby to the command. This is resolved. Thanks!

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