Safari history sync between macbook and iphone stops working after a few hours

hi,

since a couple of days the safari history sync between macbook and iphone stops working after a few hours. the macbook has the correct history from both devices but the iphone has only it's own history after a few ours and will not get the history parts from the macbook.

tabs and everything else works as expected.

resetting both devices, clearing the history, etc. has no effect. the sync starts working for a few hours and then the iphone seems to ignore history entries from the macbook.

has anyone hints how to solve this

best regards,