FNP90/5-7 - default accuracy lowered by 10% with all ammo types?

I have run into an issue I am have troubleshooting - apparently all 5.7 mm weapons - both the 5-7 and the FNP90 - suffer an inherent 10% accuracy loss applied to any ammunition inserted - something I can not reproduce with other weapons and not with the prior version I was playing on (3.7.5).

Default accuracy for the 5-7 as per info window is 7.5 MOA:

Inserting any kind of ammunition degrades accuracy by ~10% - see example with SS190, which - as per item.json and info window should have no impact on accuracy. Despite this accuracy drops to 8.25 MOA:

Using SB193 - which should actually improve accuracy by 5% - instead lowers accuracy to 7.85 MOA:

This is the same for FNP90.

The rest of the pistols and SMGs using other cartridges seem to be unaffected by this.

Is there something I am missing here? Can anybody reproduce this issue?

EDIT:

Apologies, I just noticed that there where still some armor and overheating related customizations present which show up as data import errors. The reported bug persists even after replacing the database files with the default ones, here is the updated server log:

SPT PrivateBin

Visit this link to see the note. Giving the URL to anyone allows them to access the note, too.

codepaste.sp-tarkov.com

Here is the issue as it appears on the P90:

Quote from iexistggrsd

Try modifying the ammo stats with Server Value Modifier: Changing Individual AMMO Stats?

Doing so reproduces the problem - setting the accuracy to +10 for SS190 results in an accuracy gain of 0 in the 5-7 and the P90.

Does this also happen on your end?