Device Fix time issue

We are facing an issue related to device fix time.

Please check following times sent to our server.

"serverTime": "2019-08-26T08:13:14.397+0000",
"deviceTime": "2019-08-26T08:13:14.273+0000", -> 26 Aug
"fixTime": "2019-09-04T17:34:37.000+0000",  -> 4 Sept 

In some cases, Fix time is more than the device time and sometimes its lesser.

There are more than 5 cases like this, we have started facing this issue recently and aren't able find a fix.

Is there anyone facing this issue?

I don't know but i tried connecting the same device with demo.traccar.org and it worked.
After that, i again connected the same device on my own server and it worked.
Any idea why it worked?