Desktop Sync synchronizes large files before they are saved

When saving large files, the synchronizer, without waiting for the end of saving, starts synchronization. What interrupts the process of saving a file by other programs that start issuing saving errors because the file starts to be used by another process. This happens when re-saving already existing files. When saving as a new file, there is no such problem.
*Lastest version Nextcloud Decktop client (for win). Works the same on different computers.