Sz'weh seeing through blindness

Was fighting Sz'weh warriors and blinding them early into combat. But when I fled and returned they would auto-attack while still being blind. Not sure if this is a bug or just something special for them. civilized <100%hp 96%m 97%mv 2440tnl (52.16%) 6 AM> You narrow your eyes and glare in a Sz'weh warrior's direction. A Sz'weh warrior clutches his eyes in regret as ******** answers your entreaty! A Sz'weh warrior has some small but disgusting cuts. ***Fight a couple rounds, but haven falls, so I flee and commune just for the heck of it.*** civilized <92%hp 93%m 97%mv 2440tnl (52.16%) 6 AM> flee In the Village of the Sz'weh [Exits: north east south west] You flee from combat! wilderness <95%hp 96%m 99%mv 2440tnl (52.16%) 7 AM> com 'haven' You close your eyes and hum for an instant. You seek ********'s hand to shield you from harm. wilderness <95%hp 80%m 99%mv 2440tnl (52.16%) 7 AM> n Inside a Sz'weh warrior's Hut [Exits: south] A Sz'weh warrior decides to sacrifice you to its dark gods. You yell 'Help! I'm being attacked by a Sz'weh warrior!' A Sz'weh warrior misses you. A Sz'weh warrior hits you. Your shield blocks a Sz'weh warrior's cleave. Your stab wounds a Sz'weh warrior. A Sz'weh warrior is covered with bleeding wounds. civilized <91%hp 80%m 98%mv 2440tnl (52.16%) 7 AM> Your shield blocks a Sz'weh warrior's cleave. Your shield blocks a Sz'weh warrior's cleave. A Sz'weh warrior dodges your stab. A Sz'weh warrior is covered with bleeding wounds. civilized <91%hp 80%m 98%mv 2440tnl (52.16%) 7 AM> com 'blindness' You narrow your eyes and glare in a Sz'weh warrior's direction. A Sz'weh warrior is already blind. A Sz'weh warrior is covered with bleeding wounds.