These screenshots are from ruby/resolv. <img width="194" height="141" alt="Image" src="https://github.com/user-attachments/assets/76eec41a-44e5-4cc7-88f4-2bfb6cbde2b9" /> The opened trees are same too. <img width="194" height="679" alt="Image" src="https://github.com/user-attachments/assets/68817363-4ece-44e5-93e0-aee4b3d2ad79" /> I don't know what the trigger is, but I've sometimes seen the same problem for years.