Where did the obelisks disappear to?

Please clarify: did they disappear from a single-player map where they were originally located? Is there nothing in those locations now? Or are there no obelisks on a randomly generated map?
Please provide the map and save file (if you can't attach it here, upload it to Google Drive, Yandex Disk, or Mail.ru and provide a link). Also, specify your HD mod version. Then we can figure out the cause of the problem.