[Help] Lost files in a replicator/preferred server

Hi guys, I'm setting up some Ivanti preferred server from few months ago, everything is fine, but recently, when I transfer file from a replicator server to a preferred server, it lost files, for example: it copied 60GBs, then the day after, it lost 40GBs. Since I use a schedule to run a process, I cannot see a log after it failed. Do you guys have any idea or where to find all the logs of this process? Please help me, thank you in advance.
Btw: I tried to reach ivanti support but the template of support page is quite complicated, so I still cannot find a place where I can send an email