updateTssAndConnectorAddresses from ZetaNonEth.sol is allowing TSS and Updater adresses to be updated to the same address, which defeat the purpose of renounceTssAddressUpdater. I would recommend to add the followind condition to protect against this.
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/protocol-contracts/contracts/evm/Zeta.non-eth.sol#L40-L49
