no benefits while blind in a cave

Expected: Seeing something while blind in a cave as a caverndweller ranger. I thought exits would be visible at least. Maybe other creatures or just PCs shown as "Someone"? Actual: Fulstil utters the words, 'noselacri'. Your eyes roll back, and a viscid haze fouls your eyes, bringing darkness. Someone is covered with bleeding wounds. <90%/590hp 46%m 100%mv 4934tnl fighting wilderness CAVE indoor/none 6 PM> Your defensive spin deflects someone's claw. Your thrust DISMEMBERS someone! Someone parries your thrust. Something glows a soft green in your hands. You feel better! Someone is covered with bleeding wounds. *snip rest of the fight* <87%/590hp 19%m 100%mv 4794tnl standing wilderness CAVE indoor/none 7 PM> af You are affected by: Skill: 'warcry' modifies save vs spell by -8 for 40 hours. Skill: 'warcry' modifies hit roll by 4 for 40 hours. Skill: 'acute vision' for 31 hours. Skill: 'bark skin' modifies armor class by -52 for 24 hours. Spell: 'armor' modifies armor class by -20 for 21 hours. Skill: 'protection heat cold' modifies cold resistance by 25 for 21 hours. Skill: 'protection heat cold' modifies fire resistance by 25 for 21 hours. Power: 'windwalk' for 18 hours. Power: 'windwalk' for 18 hours. Spell: 'blindness' modifies hit roll by -4 for 8 hours. Power: 'harmony' modifies wisdom by 1 for 6 hours. Power: 'unbound spirit' modifies wisdom by 2 for -1 hours. Power: 'unbound spirit' modifies morale by 10 for -1 hours. <87%/590hp 19%m 100%mv 4794tnl standing wilderness CAVE indoor/none 7 PM> l You can't see a thing! <90%/590hp 22%m 100%mv 4794tnl standing wilderness CAVE indoor/none 8 PM> e You aren't calm enough to creep. You step out from your cover. You can't see a thing! <90%/590hp 22%m 99%mv 4794tnl standing wilderness CAVE indoor/none 8 PM> w You can't see a thing! Steps to reproduce: Be a caverndweller ranger. Go to a cave. Get blind. ? Repro rate: 100/100; it happened constantly getting dirted by prisoners in the (cave) prison in the arial city, and this excerpt of getting the blindness spell from a Talshidar in those caves.