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When Electrum Bitcoin wallet queries a random Electrum Server does it send the public key to the server or does it send a batch of addresses to check?

For instance, after setting up Electrum Personal Server between Electrum and a Bitcoin Core full node would it be prudent to create a new wallet and transfer funds to protect future privacy? (e.g. move funds from 84-0-0-0 to 84-0-0-1) Is it possible that previously connected to Electrum Servers that are potentially malicious have saved public keys to aid in chain analysis, or are they only given a batch of addresses to check making this attack impossible as you migrate to addresses further down the list?

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