Hello,
Thank you for providing information about your issue,
Could you confirm that you are using "Time Synchronization" settings "Disable (GPS)" only in your configuration? This could be the cause of your problem, since you should be getting GPS time synchronization (which at certain times could be incorrect). It is recommended to use time synchronization NTP( NTP server time ), NITZ (GSM operator time) or both (NITZ + NTP).
Please confirm this and try using NTP/NITZ/NITZ + NTP settings for Time Synchronization and tell us if the problem persists.
Best regards.