Unable to engrave high level uncut skill gems when relying on "The Vertex Tribal Mask"

When having "The Vertex Tribal Mask" equipped, my character has half the skill gem requirements, but that doesn't extend to using uncut skill gems. It thinks I do not have the requirements, but I should be able to use those gems. Respec-ing and engraving and respec-ing again solves the problem, but that makes the item basically useless, since it would be a massive gold drain. A solution would be if the item changed the innate cost of all skill gems on the character, not halve them after equipping them. Please change it, the item would be really cool