Heya,

Not sure if this is an issue with ForgeUI, but trying to narrow it down.
So my question: Does ForgeUI hide Guild Holomarks on players? Cause mine stopped showing up when I started using this Addon.

No. ForgeUI doesn't do anything with holo marks. Their settings is in Character window ( C ) under the Titles tab. You can show/hid them there.

Yeah that's the thing, the settings ain't do anything so something is interfering with their display.
But if ForgeUI is not involved with this I will continue my search.
Thanks for answering.