The phrase "lingering concerns" means that there are worries or doubts that have not completely gone away and are still on people's minds. Full definition
The 15th edition of this benchmark annual report explores lingering concerns about the recovery's pace and stability even as states and school districts seek to rebuild their budgets. (edweek.org)
That could, in part, reflect lingering concerns over sluggish wage and price gains. (fortune.com)
The contract comes amidst lingering concerns the factory will leave the state. (wrvo.org)