Abyssal Liches still exceptionally rare?

Today's 3.1.3 patch will increase the spawn rate of Liches. They will be 125% more likely to appear in Maps. There is (and has been) a bug where Maps that contain The Elder, Elder Guardians, Labyrinth Trials or master missions that have a subarea are not able to contain Abyssal Depths. We are unlikely to be able to resolve this issue before the end of 3.1.0. The increase in spawn rate should counteract the effect of this bug in the meantime.