Why does 1C synchronization only work in one direction?

Question

1C-Enterprise

We set up Bitirx24 and 1C UNF synchronization with the standard module, everything is updated to the maximum.
Synchronization works, but only in one direction.
An order appears in 1C with goods and customer data (from the site, yes, it’s so strange here) - it gets into B24, everything is gorgeous.

However, if in this transaction in Bitrix24 you add a product, or update it, or simply change the status, then there are no changes in 1C in the order.
The unsent packets are empty, there are no errors, it just doesn't want to, and that's it.
I ask to prompt where to dig where it is possible to look.

Answer 1

Apparently it is necessary to complete the synchronization so that it works in both directions.

Answer 2

Cloud or box?

Answer 3

The question is closed!
The answer was that the product had too many characteristics and the standard module was stupidly transmitting data for too long. So slowly that the feeling was that it does not convey. It's about 3-5 hours.
classic in general)