SSD 1TB | warning: inode_val: object (oid 0x2a6975): invalid bsd_flags (0x10)

After installing to MacOS 10.14.2, I ran a First-aid (including on Recovery Mode and Recovery Mode using a MacOS Mojave 10.14.2 USB Installer) on my 1 TB SSD and received this following error:

Running First Aid on “Macintosh HD” (disk1s1)
Performing fsck_apfs -n -l -x /dev/rdisk1s1
Checking the container superblock.
Checking the EFI jumpstart record.
Checking the space manager.
Checking the space manager free queue trees.
Checking the object map.
Checking volume.
Checking the APFS volume superblock.
The volume Macintosh HD was formatted by diskmanagementd (945.230.6) and last modified by apfs_kext (945.230.6).
Checking the object map.
Checking the snapshot metadata tree.
Checking the snapshot metadata.
Checking the extent ref tree.
Checking the fsroot tree.

warning: inode_val: object (oid 0x2a6975): invalid bsd_flags (0x10)

Verifying allocated space.
Performing deferred repairs.
The volume /dev/rdisk1s1 appears to be OK.
Operation successful.

It seems first-aid cannot repair it at all. So formatted the hard disk using USB Installer on Recovery Mode and reinstalled MacOS again. After that, I ran first-aid again and it did not show the warning. Then after one day, I ran again and here it is showing the same error. System freezes sometimes, which should not happen to this as it is a high specs machine and normal browsing should not freeze it.

I bought the MacBook Pro 15 inch one month ago. Any suggestion to resolve the issue?

System Specification:

MacBook Pro 15 Inch Late 2018

Processor: Intel 8th Generation I9 2.9 GHz

RAM: 32 GB

GPU: Radeon Pro Vega 20 4GB

Hard Drive: 1 TB SSD