Any idea why my fireplace mesh pulls away at the centre bottom

Name: Any idea why my fireplace mesh pulls away at the centre bottom
SKU: 07007783259
Price: 12.99 USD
Availability: OnlineOnly
Rating: 4.6 (669 reviews)

$ 12.99 · 4.6 (669) · In stock

Any idea why my fireplace mesh pulls away at the centre bottom, creating a “hole” in the screen? : r/HomeMaintenance