I've checked and it seems that both tooltips (one for the skill itself and other is for the status effect "Mending" on characters) do not take caster's Geomancer into calculation when showing the expected PA restoration per turn. However, actual amount of Physical Armour restored per turn is correct.
In my case, when characters without Geomancer hover over Mend Metal skill, it shows that it will restore 17 PA per turn. When my character with 3 Geomancer does the same, it shows the same amount. However, when my Geomancer actually uses the skill, it restores 20 PA (like it should), not 17.
Screenshot:
[img]https://i.imgur.com/saxLlat.png[/img]
