I would definitely bring the computer back to Apple to check the drive. Take advantage of the warranty. And, considering the numerous problems that have been reported with Seagate, it would be prudent to back up everything ASAP.

Have you tested the drive using SMART? SMART is not exactly infallible if it says that the drive is OK but it is 100% accurate if it says the drive is failing. If you have access to TechTool Pro or TechTool Deluxe, you could also run a surface scan although that might take several hours.

Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365