I don't believe this is the fault of the Trezor. It has built in precautions built if Trezor is disconnected. And I have just tested it.
  1. Wipe Trezor
  2. Create new seed
  3. Note the 'backup needed' message
  4. Backup words 1-3
  5. Disconnect Trezor
  6. Reconnect Trezor
  7. See 'backup failed' on Trezor
  8. See 'backup failed' in Trezor Suite.
That post was written in 2021, things may have changed
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Dunno exactly for 2021, but definitely in 2022 it behaved like this.
Also the Model 1 firmware updates have mostly been about security and not so much about features.
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