Reduced attributes cause skill tree to show skill requirement warning even when not applicable

I currently have 182 dexterity. The item I have equipped requires 173 dexterity. I also have the Runegraft of the Fortress, giving me 10% reduced Attributes.

When I try to respec a +10 dexterity node on the passive tree, I get the warning "1 more dexterity required". But when I actually remove the node, I end up with exactly 173 dex and have no issue wearing my gear.

I do realize this is an edge case, and it might not be easy to account for reduced attributes when displaying the warning.