Now, when synchronizing in the direction of the server, the program offers to synchronize files created in the interval from 00:00 to 7:00. When synchronizing in the opposite direction, there is no such problem.
Time settings on FTP server: Greenwich.
Local time plus seven.
Time zone offset (advanced site settings): +7
Tried other options with offset (7, 0, -7, automatic). Or I changed the time on the FTP server by plus 7. Nothing helps. All the same, in the direction of the server, files are re-offered for synchronization.
Version of WINSCP: 5.9.13