Deleting a username not freeing it to be reserved by another account

[0xunusedusername]

• [x] I have searched open and closed issues for duplicates
• [x] I am submitting a bug report for existing functionality that does not work as intended
• [x] I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
• [x] This isn't a feature request or a discussion topic

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Bug description

Deleting a username does not free it to be reserved by another account

Steps to reproduce

• delete username reserved on one account
• attempt to claim from a different account

Actual result: username says it's still unavailable Expected result: username is available to reserve from the other account

Device info

Device: Google Pixel 8 Pro Android version: 14.0.0_r29 Signal version: 7.0.2

The log says UsernameRepository: [deleteUsername] Successfully deleted username

But it's still not available

[0xunusedusername]

INFO  2024-03-15T18:22:19.993Z PUT (REST) https://chat.signal.org/v1/accounts/username_hash/reserve

INFO  2024-03-15T18:22:20.148Z createHTTPSAgent.createConnection(chat.signal.org): connected to IPv4 addr after 145ms (attempts v4=1 v6=0)

ERROR 2024-03-15T18:22:20.242Z PUT (REST) https://chat.signal.org/v1/accounts/username_hash/reserve 409 Error

INFO  2024-03-15T18:22:27.416Z handleOutsideClick: ProfileEditorModal handled click

INFO  2024-03-15T18:22:29.441Z handleOutsideClick: ConfirmationDialog.EditUsernameModalBody.confirmChange handled click

ERROR 2024-03-15T18:22:29.442Z assert failure: Error: This should not happen
    at assertDev ([REDACTED]/Resources/app.asar/preload.bundle.js:21:278)
    at [REDACTED]/Resources/app.asar/preload.bundle.js:96:215791
    at [REDACTED]/Resources/app.asar/preload.bundle.js:136:214
    at [REDACTED]/Resources/app.asar/preload.bundle.js:126:267695
    at n.<computed> ([REDACTED]/Resources/app.asar/preload.bundle.js:82:47333)
    at Object.action ([REDACTED]/Resources/app.asar/preload.bundle.js:123:32784)
    at onClick ([REDACTED]/Resources/app.asar/preload.bundle.js:86:316953)
    at Object.Rb ([REDACTED]/Resources/app.asar/preload.bundle.js:68:9858)
    at Xb ([REDACTED]/Resources/app.asar/preload.bundle.js:68:10032)
    at Yb ([REDACTED]/Resources/app.asar/preload.bundle.js:68:10104)

response when attempting to reserve the deleted username

[0xunusedusername]

Deleting the account entirely does not appear to free it either

[ghost]

Maybe it's intended so people doesn't add someone via a username which he no longer uses and than add another person by it, but this is definitly something which should be pointed out to people

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[greyson-signal]

I forget the exact period of time (maybe 3 days?) but usernames are, in fact, unreservable by others for a period of time after removing it. This is intended to prevent usernames getting taken from someone before they've had a chance to let people know they've changed their username.