[Bug]: Flaky test

[MCJOHN974]

Flaky test

Steps to reproduce

Test name: sign_bitcoin_transaction_withdrawals,
Seed: 11927325706687835236u64,
Commit: 5bf0cbe

Link to failed CI job: https://github.com/stacks-sbtc/sbtc/actions/runs/21983858572/job/63513033523

Note: this commit is not in main branch but in viktar/emily-throttle branch, however I'm not sure if this problem is pr-specific, probably it just passes on main because random works differently

[djordon]

Was the failure observed in CI?

[MCJOHN974]

Was the failure observed in CI?

Added link to failed job in ticket