Printify has canceled my order three times with different printer providers. Is anyone else experiencing issues?

The listing in question has been printed several times in the past. When Printify initially canceled it, I assumed it was a fulfillment issue, even though I expressly chose only stocked variants to prevent such an issue. In the next step, I duplicated the order and chose Monster Digital; it was canceled again, and so on.

The only explanation I am given is it was 'canceled by the provider and to choose another print provider." The product is Bella + Canvas 3001, Heather Clay size medium.

Is anyone else having a print/fulfillment issue?