Did Trezor Suite (Oct 2022) cache passphrase between sessions on Trezor Model One?

Hello,

I have a specific technical question about how Trezor Suite handled passphrases in October 2022 on Trezor Model One.

Scenario: On October 4, 2022, during initial setup in Trezor Suite, I entered something into a masked input field without realizing it was a passphrase prompt. I then used the resulting wallet via MetaMask + BSC.

Five days later (October 9), after the Trezor had been physically disconnected, I successfully signed an outgoing transaction from this wallet (5 BUSD test transfer back to Binance). I only entered the PIN — I do not recall any passphrase prompt.

My question:

Was it possible in Trezor Suite (October 2022 version) for a passphrase to be entered ONCE during initial setup and then cached/remembered so that a subsequent signing transaction required only PIN entry, with no passphrase prompt?

It would help me enormously — it determines whether my lost wallet has a passphrase I should keep brute-forcing, or whether I should stop and look elsewhere.

What I have already tried over ~4 years:

  • Brute-forced ~2 billion passphrase candidates with FixMyCrypto

  • All my known password patterns + their keyboard-layout transliterations (Latin/Cyrillic)

  • All numeric combinations up to 9 digits

  • Common symbol/case variations and dictionary attacks

  • Wallet Recovery Services (Dave Bitcoin) — several years, no result

  • Two hypnosis sessions to try to recall the setup moment

  • Verified seed is correct via Trezor’s built-in check

  • Checked all HD paths (BIP44, Legacy, Ledger Live) in MetaMask and iancoleman — address not found without a passphrase

Thank you, Artem.

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If you unplugged the Trezor between sessions, the answer is a decisive no. There never had been a feature that would cache your passphrase between device restarts.