Syncing between users is not working

Hello there! I am on the paid plan with three users. I have just been doing a screenshare with a colleague who is admin/developer however when I change the body of a request, or a header or something within my collection, and press sync, they are not seeing the changes I make and vice versa. However I created all the requests in the collection and when they downloaded and logged into Postman they got everything that I had initially created.
My question is… how come are requests/headers/bodies not syncing up between apps, and is there a way for me to debug this?