Bug? Diseased Undead + Burden of Time

[Shasarak]

Playing Late Age Ermor

Undead Old Age Bug Caused by the global Burden of Time enchantment.

Diseased + Afflictions seem to happen to the Arch Bishop first since they are "old" at 500. The Dusk Elders don't get old until 3000. The afflictions don't seem to hurt the more powerful undead except for Mute which halves the magic skills (now my prophet is only a level 2 priest instead of level 4 ouch!) The Undead trait states they are not affected by disease or old age. Could this be fixed by adding a few zeros to the old age limit for Ermor undead?