Backup-Decrypt not fully decrypts db file

[tobn03]

So, first I created a backup of my iPhone with iTunes, then I copied over to Ubuntu WSL instance and decrypted.
The backup-decrypt process didn't show errors at all.

For example the Manifest.db looks like this in original encrypted backup:
æØ‘"ñ†Ä #�rFo¼àp�¶+J§ÂÚb7��ã£É�û¨6¯ºõæJ�š�{%&Œ€’¸�%«ˆ7]Îßœ›;©yOšúQÑb½]ºõeÄýú<Gõ éE²©µ�â¹¥ÎÛ%Î~�¶ÆËç=…ÿÂ6Pn׆æ,‘olk>âÛ�ºiI/@r½[��y:%��˜Ógõ��ëÉÇþ�”)§6U¤É�Lƒ]«�FŠ¥X�\ž�˜�IW�Êá�jÉ )G YJö#…u �2�v^úY‚Ò€/Ƨ#jd6q�Öì9�Þ$ã�Αäs©�&s�Lú’¡{¡6�¡<Ñ�€á„ð�yu��6ã
��ùå¥!Ù¥Æm­‹QPÔ�÷‘ݦ¶Ëd�ôâöv�.Ëø�µé¾j­f¡†Ge;#–��b£‘ØQ�$Øõ¬akiBz�¾,³±�F.eѳ�=)5„
¨¶�àœº´ý`ÊŠ»��Åg ±i™‚v3Z�d%uEåú¦ø�¸±ý˜Ð��Ô�Ëm!]�Þ@kÄ«å¼ÔÒÆ4P,¢DWå�Ñû�¢$RÌOe�UâòcYMa

After running backup-decrypt it's somehow decrypted but not fully and can therefore not be interpreted as a valid db file:
�W.�]�269a97d0cc9b73ce3
d3428291209324bc795ffbf�-�]�70ad65d08c748ed9c2ddc58738eac5d0f77a8fd9E'�-�]�86828b2adb5c617ea241f47a1d662fec5d530fc0s�'-�]�d8
6f5a83c9dec59f49b4f69aa512ad54fedd67d0Xt �-�]�b186f868a530aac4bbf06b3c25a1efcdbbe6b272�a�X-�]�4e84d7364d811624c505660a5e
effbfa5af750d7,2��D���}������U

Using
Python 3.12.3
MVT 2.5.4 (installed from source)
iTunes 12.13.4.4
iPhone X --> iOS 16.7.10 --> no jailbreak device

Since my iPhone is bit older (iOS 16 is the most current version for this device) and the most current iOS version is 18 probably this can be a cause. Maybe the structure of the db file has changed a bit and now it cannot be fully interpreted anymore? May I should try an older version of MVT?

I'm little bit lost here, any help would be appreciated. Thanks!