Labyrinth Darkshrine Bug with Additional Font Use

When receiving the additional use of the Divine Font, the modifier/message does not appear in the upper right hand corner when hitting 'tab' to view the usual darkshrine mods. Typically it'd read "The character will receive an additional use of the Divine Font.." and so on. I've ran 20+ labs and every time I receive the additional blessing, no message appears in the upper right hand corner. All other darkshrine effects appear there, such as "Labyrinth Traps are Disabled in the Aspirant's Trial".