ContentPage with homepage flag does not synchronize from CMSCockpit

Hi, i am trying to synchronize a new ContentPage from Staged to Online, the changes i made were to flag this page as a "homepage". If i synchronize the entire catalog from the HMC, this works fine but when i synchronize the entire catalog from the CMSCockpit, the synchronization finishes and all pages that had the "homepage" flag set to true are now set to false. I recently updated to Hybris 5.7 and previously this mechanism worked fine. Is there any kind of documentation regarding this issue or how the homepage flag is supposed to be handled? Is there a way to fix this? Thanks Alessandro