As far as I can see Ray Strode [halfline] fixed the bug upstream with commit d7eda0dde0abaade523b1485e1803cee29d1c824- next tag is then "3.25.3". Thanks to him and David Härdeman! Unfortunately even Debian sid is only at 3.22.3-4 so we have to wait or to compile... :( Thank you all!