Uuid v7 generated in wrong order

[fannyfan414]

Hello, I came across a strange case where the library generated uuid v7 incorrectly in time.

Here example of table id = Uuid::uuid7()->toString() and created_at (server datetime), sorted by id (asc)

id, created_at
018d7fca-3ae5-7306-a040-204628e43dc9, 2024-02-06T18:59:36.000000Z
018d7fdc-0ba8-7006-8047-41a572a695c6, 2024-02-06T19:19:03.000000Z
018d8030-0dab-7206-a042-31238ed9cb48, 2024-02-06T20:50:49.000000Z
018d8041-7c1b-7106-8043-6c5e69c8fbbd, 2024-02-06T21:09:51.000000Z
01a6ce4c-5a19-7006-b045-197ad8210718, 2024-02-06T19:19:54.000000Z

For some reason, ID=01a6ce4c-5a19-7006-b045-197ad8210718 was generated incorrectly

[fannyfan414]

Another wrong generations:

id, created_at
018d8796-b0c2-71ec-a637-7ad6a9a68a3c, 2024-02-08T07:20:16.000000Z
018d8799-185b-72ec-963e-54e7016030d8, 2024-02-08T07:22:54.000000Z
018d8799-5cd1-71ec-863a-f076be6535c6, 2024-02-08T07:23:11.000000Z
018d8799-8d0d-70ec-a637-743e23347b0d, 2024-02-08T07:23:23.000000Z
018d879c-3258-72ec-8638-8a684bdc8bb6, 2024-02-08T07:26:17.000000Z
01f7b992-d225-73ec-863e-d9d832540274, 2024-02-08T07:16:07.000000Z

01f7b992-d225-73ec-863e-d9d832540274 generated from incorrect time

[fannyfan414]

And one more example (this ids use in messages table), messages sorted by "id", since in theory uuid v7 should be monotonically increasing

Therefore, because of this bug, sometimes the wrong order of messages appears in correspondence

id, created_at
018d8537-8800-71ec-9631-9041bbb08aa2, 2024-02-07T20:17:05.000000Z
018d8537-b73c-72ec-a63c-f0dc35e6eb67, 2024-02-07T20:17:17.000000Z
018d8537-b74e-71ec-8637-616a01cbf9c8, 2024-02-07T20:17:17.000000Z
018d8537-b7ce-73ec-9635-37455306d8bc, 2024-02-07T20:17:17.000000Z
018d855d-4059-72ec-9633-ecea8496ee53, 2024-02-07T20:58:17.000000Z
018d8766-2d2e-73ec-b632-eb1529031055, 2024-02-08T06:27:16.000000Z
01b0b44d-a613-71ec-b637-cbb67c05e163, 2024-02-07T20:24:24.000000Z

018d8766-2d2e-73ec-b632-eb1529031055 and 01b0b44d-a613-71ec-b637-cbb67c05e163 generated incorrectly

[ramsey]

1. Are these UUIDs all generated on the same machine? Are they generated within the same process?
2. Are you able to consistently reproduce this issue with a short snippet of code? Can you reproduce it on different machines?
3. Can you reproduce the issue when generating UUIDv7 using symfony/uid? ramsey/uuid borrows code from symfony/uid, so if you can reproduce it with that library, then both of our libraries have the same bug.