wrong luks header backup file size after conversion to LUKS2

Hi,
Recently I successfully converted LUKS1 partition to LUKS2 and created
a header backup after the conversion.
LUKS1 root partition was created by opensuze tumbleweed installer
The length of this header backup file is wrong: 2097152 bytes what is
corresponding to the LUKS1 header size.

ls -l
-r-------- 1 root root  2097152 Feb 15 20:01 nvme0n1p9.img

Command used to create header backup
sudo cryptsetup luksHeaderBackup /dev/nvme0n1p9 --header-backup-file
/tmp/HBAK/nvme0n1p9.img

Used cryptsetup versions for header backup - 2.7.0 tumbleweed and
cryptsetup 2.4.3 Linux Mint:

sudo cryptsetup --version
cryptsetup 2.7.0 flags: UDEV BLKID KEYRING FIPS KERNEL_CAPI PWQUALITY HW_OPAL

Commands used for conversion from LUKS1 to LUKS2:

cryptsetup 2.4.3
sudo cryptsetup convert /dev/nvme0n1p9 --type luks2
sudo cryptsetup luksConvertKey /dev/nvme0n1p9 --pbkdf argon2id

luksDump:

sudo cryptsetup luksDump /dev/nvme0n1p9
LUKS header information
Version:        2
Epoch:          8
Metadata area: 16384 [bytes]
Keyslots area: 2064384 [bytes]
UUID:          3d6055ea-4ab5-4dd0-8f3b-93f51dcc6ddd
Label:          1n1p9-OS-R
Subsystem:      (no subsystem)
Flags:        (no flags)

Data segments:
  0: crypt
offset: 2097152 [bytes]
length: (whole device)
cipher: aes-xts-plain64
sector: 512 [bytes]

Keyslots:
  0: luks2
Key:        512 bits
Priority:   normal
Cipher:     aes-xts-plain64
Cipher key: 512 bits
PBKDF:      argon2id
Time cost:  9
Memory:     1048576
Threads:    4
Salt:       04 80 c1 a7 63 01 d6 c5 79 87 56 c6 1a a8 63 66
            35 20 5a 1e 8b 00 8e ec 21 db 13 4d f8 0f 34 6f
AF stripes: 4000
AF hash:    sha256
Area offset:290816 [bytes]
Area length:258048 [bytes]
Digest ID:  0
  3: luks2
Key:        512 bits
Priority:   normal
Cipher:     aes-xts-plain64
Cipher key: 512 bits
PBKDF:      argon2id
Time cost:  9
Memory:     1048576
Threads:    4
Salt:       32 45 1d b6 b9 64 f6 60 0c cd 5d b7 5c 3b fd f7
            79 64 51 12 5a 9d 33 4c 1c cd 4b 03 6a ad ef b0
AF stripes: 4000
AF hash:    sha256
Area offset:32768 [bytes]
Area length:258048 [bytes]
Digest ID:  0
Tokens:
Digests:
  0: pbkdf2
Hash:       sha256
Iterations: 328913
Salt:       3d 3b d9 a5 ba 75 86 7f 7d 12 66 c1 01 58 2e b2
            58 e0 b4 c0 4f 26 4f 65 4f 69 1a 7f f7 94 d4 3f
Digest:     00 2e 58 47 d4 9c e7 df e4 17 c1 06 c8 e4 10 53
            e9 16 4d 89