What threatens to freeze the contract on Upwork?

Question

Freelance

Today I received a letter that the contract was frozen. Who knows why this happens and what are the consequences?

Hello,
We've noticed some possible issues with your contract with ***.
While we take a closer look, we'll need to put your contract on hold temporarily.
Please hold off on working on this contract until we give you the all clear. I know these holds are frustrating, but they are essential for the safety of your account and the marketplace. We're doing all we can to clear things up quickly.
Our apologies for the inconvenience. This is a big deal to us too, and we'll do all we can to get you back working on Upwork as soon as possible.
Regards,
Upwork Customer Support

Answer 1

Most often, this happens automatically when the customer's linked card expires, for example, or he unties it himself and does not connect the new payment method. In general, when the last write-off from the customer was unsuccessful.
Under certain circumstances, you can stay in flight for money even on an hourly contract.

Answer 2

no threat