Blockchain.com is a scam and has been proven to be insecure in the past due to mathematically invalid seed generations.
Ontop of that they don't support a boatload of features, such as RBF, CPFP, Segwit, exporting of private keys, and ontop of that blockchain.com logs browser details, IP's, and fingerprints your devices.. Also, if they change anything about their Javascript, they could log your passwords & steal your funds, Oh the comfort of using a webwallet, am i rite. Although i don't necessarily expect them to do that, you never know.
Use Bitcoin core or Electrum instead.