I have now the same issue:
I've updated password in MacOS, synced
Synced on Android device, than checked and password was old on the phone
Then I've made another test:
Under the same record I've changed "title" in MacOS, synced
Synced on the phone
Title for the record was changed immediately, but password stayed the old.
So, two fields was edited on MacOS (title and password). But only "title" was updated on the Android phone.
P.S. syncing with Google Drive