Three themes I'm currently using, Startup, Delight, & Oxygen, are not showing that there is an update for the Gantry 5 framework. I also have some Rocket Theme templates where the same thing is happening. On the flip side, all the sites using the free Gantry 5 Hydrogen or Helium template are showing there is an update available for the Gantry 5 framework.
I've cleared the cache, clicked on "rebuild" under "Update sites", and clicked on "find updates", but it still does not show an update is available. Any ideas as to why this is?