Gaming DLC content doesn't appear when mounting game folder and/or ISO via homebrew apps

[LEO33]

I'm on Rebug 4.84.2 REX. The game is God of War 3 (BCES00799), and I have purchased all its DLCs through its respective region PS store. When I play from my disc, all DLC costumes appear correctly in the menu to choose. But when mounting the disc from webMAN MOD and multiMAN (I have tested only these two homebrew apps so far), from 7 total DLCs, only one doesn't work; the Deimos costume, which does not appear in the bonus costumes menu. I have tested both the ISO, and the folder format of the game, and still the same, even when trying the DLC fix PKG available online. Again, notice that the Deimos costume shows up when I start the game from the Blu-ray disk.

Is this a bug or something I do wrong?

UPDATE: I have partially solved this problem by installing only the problematic Deimos costume DLC, and having no others DLCs installed, if I install the other DLCs, the Deimos costume strangely disappears.