Chicago Terminal brought these cars over to Goose Island and parked them just east of the swing bridge on the former Finkl site back in Fall 2017 (October maybe?). They sat there until February 2018, when CTM brought them back over the bridge and parked them on the current siding seen in your Google Maps view. Apparently this was also CTM's final move on Goose Island.
https://www.flickr.com/photos/19531332@N03/39577287354/in/feed ILSX 900 was removed sometime before/during September 2019, according Cnwnorthline's post on 09/11/2019. I was just over by Sipi a few weeks ago, and the 5 reefer cars are still there. Four are "Cold Train" cars re-stamped NRDX, and the 5th car appears to once have belonged to Amtrak.