How are you exporting the private key? Did you run dumpprivkey YOUR_ADDRESS?

Can you try creating a new Bitcoin Core wallet, and then importing that private key into the new wallet using importprivkey, and see if the new wallet shows a different address?

Alternatively it's possible that in Electrum you pasted the private key without putting p2wpkh: in front of it. If you don't do that then you might generate an address starting with a "1" or "3" instead of native segwit's bc1.

Hi All.
Since yesterday I have serious problem to access on blockchain.com account. When I tried to login, I didn't got any authorization email. I've tried several times. Nothing. All the emails arrived exactly 1 hour later my request. Today I tried again, but no authorization email arrived.

I've already wrote to the support team (but they are very slow). Also used my backup phrases to restore my account using a new email. On the new address I receive email without problem. The bad thing is that the major btc I have on blockchain.com are on the interest balance and this amount was not recovered with the backup.

Someone has similar experience? What I can do?