Hello and sorry if this has been reported in "Bug Reports" category already. Couldn't find it here.
Undaunted mettle passive stopped working and wasn't fixed in todays maintenance. Even if the tooltip states 6%, magicka and stamina are not increased. Wearing 7 light or 5l/1m/1h results in exactly same magicka and stamina pool. However, health is currently affected by undaunted mettle so it does get correctly increased.
Thanks for your time.