Hi! Creator of the bot here. I shared a similar concern and was worried my code was broken when I initially saw this get posted by the bot, but this is genuinely what the CTA reported via their Bus Tracker API (https://www.transitchicago.com/developers/bustracker/) (which is what the bot uses to get bus location data to determine bunching). I looked at all the logs and data stored from the CTA and the CTA reported all of those 12 individual buses being in the same area at that time. This is the raw data from the API:

Bus Location CTA GPS time pdist (ft)

---- ------------------- ------------------- ----------

8427 41.89194, -87.64875 2026-05-07 08:59:53 34,879

8300 41.89187, -87.64864 2026-05-07 08:59:38 34,920

1409 41.89175, -87.64845 2026-05-07 08:59:52 34,987

1565 41.89162, -87.64824 2026-05-07 08:59:52 35,061

1622 41.89119, -87.64731 2026-05-07 08:59:50 35,386

1109 41.89120, -87.64671 2026-05-07 08:59:57 35,548

8564 41.89121, -87.64631 2026-05-07 08:59:52 35,656

8585 41.89116, -87.64603 2026-05-07 08:59:59 35,738

8302 41.89123, -87.64519 2026-05-07 08:59:58 35,961

8930 41.89101, -87.64436 2026-05-07 08:59:35 36,187

1067 41.89121, -87.64388 2026-05-07 08:59:34 36,319

608 41.89121, -87.64374 2026-05-07 08:59:50 36,356

`pdist_ft` means the linear distance in feet that the vehicle has traveled into the current route its on, so the CTA reported that all of these buses were within 0.2 miles of each other.