Enfold “Theme update” gives wrong information

Hi, I now have quite a few wordpress sites running with the theme “Enfold”. With most of them the check of the actuality of the theme works without problems. But with some of them there are problems again and again, that Enfold claims under “Theme-Update” that it is the newest version, although several updates have run in the meantime. All these websites have a valid private Envato key.
For examplae five minutes ago I got the following feedback:
Keine Aktualisierung verfügbar. Du verwendest die letzte Version! (4.9)