In conclusion there are the most failures at human side after mixing or whirlpool with the provided service... the spending habit...
https://bitcoinmagazine.com/guides/how-to-spend-mixed-bitcoin-privately
https://www.sparrowwallet.com/docs/spending-privately.html#paying-to-a-paynym
https://docs.samourai.io/spend-tools#stowaway
https://docs.samourai.io/wallet/privacy-enhanced-transactions#stonewallx2
Have fun.... stack sats and happy mixing 🍻