Hello,
I think you encounter the related behavior on 64-bit machines. Most likely this happens because you configured your updates detection criteria (registry value search -> "Version" registry) to search for the "Version" registry in the 64-bit registry location (this option applies only on 64-bit OSes). But the "Version" registry value will be installed by your updates setup under the 32-bit registry zone (
Wow6432Node) on 64-bit machines.
So, can you please open your updates configuration project, go to "Updates" page -> "Update Installed Detection" tab and uncheck the "Use 64-bit registry locations" option? Then rebuild your updates config file and re-upload it on your web server.
Let us know if this helped.
All the best,
Daniel