Customers gets a "You do not have permission to assign issue" when trying to create a new issue

Question

This worked for all our customers yesterday but today they all gets this error when they simply tries to create a new issue:

None of the customer has permission to assign issues to any Assignee and never has been.

Has something over night about permissions in JIRA?

Evgenii · Answer

Made ticket.
UPD from Atlassian Support:

I would like to inform you that we have reported this incident internally, and our team is currently working on it. We will keep you updated on the progress.

In the meantime, if you have any questions please don't hesitate to write back and I will be glad to assist.

Thanks for your patience and co-operation on this.

Evgenii · Answer

We have exactly the same problem.
It can be fixed, if admin grants assign permissions to reporter, but it's not suitable. We specially blocked such permissions.

And it assigns reporter as assignee, even if project is configured that Assignee must be Unassigned.

I think it's Atlassian bug, but I don't see open incident