slow to sync keynote files

Hello,

I have saved revisions to multiple keynote files in iCloud, to be shared with a group, but the same old versions keep popping up, several days after I have made the revisions. The revised versions appear in the iCloud folder on my mac, with the message "syncing" or "waiting", but revised files and new version of them with different names are not appearing on the browser iCloud page.

This delay in sync seems ridiculously long. Any thoughts?