This is an opinion based upon anecdotal personal experience from living in two different states: No.
I say that because you have goldfish and assuming the sprinkler zone affecting your pond probably runs for say, about 15 minutes or so. You have a good size pond with lots of volume. Perhaps this might not be the case with small volume ponds. I would suggest taking a bowl and placing it next to the pond when the sprinkler runs to see just how much water actually hits the pond.
Things degrading chlorine are sunlight (UV), heat atomization (Flying through the air flying through the air from the sprinkler head, filter circulation, wind etc) What I did: Programmed the sprinkler to run during daylight hours. It was a trade off because the best time to irrigate is 0200-0300 hrs. Another thing I always do is call and talk to my water company chemist. Don't rely entirely upon the printed reports. The chemist can tell you when chlorine and chloramines are higher and you can adjust your sprinkler accordingly. I would start by calling your water company and measuring the amount of water actually entering the pond.
