If you really need lock-free generation, you can use an alternate generator that uses new random bits for every submillisecond id. That's what the `ulid-py` library for Python does by default instead of incrementing the random bits.

Yes, the problem is that this mode is supported and required per the spec. So, a developer must know the pros/cons of this mode. It requires them to correctly assess the consequences. It's quite easy to shoot themsleves in the foot especially when a solid alternative like UUIDv7 exists.