The TP Move Grim Glower from the Virulent Peiste in Bedeaux[S] wears off for one game tick and then re-applies itself without the mob performing the TP move. On the second report of the effect wearing, it does not wear at all. The 3rd report seems to be correct.
Was it intended that this petrification effect be 3x normal in duration, effectively getting re-applied twice, automatically?