The router can report continous syslog messages:
Nov 13 08:17:56.056 2024 router-re0 : %PFE-6: fpc0 Adjust time 151 Nov 13 08:18:02.056 2024 router-re0 : %PFE-6: fpc0 Adjust time -29 Nov 13 08:18:05.056 2024 router-re0 : %PFE-6: fpc0 Adjust time 199 Nov 13 08:18:08.056 2024 router-re0 : %PFE-6: fpc0 Adjust time -85 Nov 13 08:18:15.056 2024 router-re0 : %PFE-6: fpc0 Adjust time 12 Nov 13 08:18:18.056 2024 router-re0 : %PFE-6: fpc0 Adjust time -84 Nov 13 08:18:21.056 2024 router-re0 : %PFE-6: fpc0 Adjust time -8 Nov 13 08:18:24.056 2024 router-re0 : %PFE-6: fpc0 Adjust time 163 Nov 13 08:18:30.056 2024 router-re0 : %PFE-6: fpc0 Adjust time 8
Such messages indicate that the router is adjusting iets time to phase align with the peer. If the logs are continuous, the probable issue is with the transmission part between the routers: for example, some issue on DWDM equipment between the routers.