The raid chest in underfoot are not dropping any runes. I've done 10 raids in various underfoot zones and not one Spell rune in any of the chest. I just did Masked Invaders again which is suppose to drop 2 Scintillating Obsidianite Runes and didn't get a single one. Please fix this.
Seems to be affected by the 125% more loot bonus. Chests only have so many slots and it appears to be reached eliminating items that should be spawning in chests like Ore in the current raids.