msec was passed to snprintf as int64 but formatted as "%03u"
Unit tests already cover this problem.
Example of buggy logs:
[2017-11-09T11:28:21.091+01:00] DEBUG System InitializeDevice: Button ActiveGroup: 1
[2017-11-09T11:28:21.091+01:00] DEBUG System InitializeDevice: Button input mode: standard(0)
[2017-11-09T11:28:21.335216:95] DEBUG System InitializeDevice: DSID: 303505d7f8000000000016c00001d9f600
[2017-11-09T11:28:21.091+01:00] DEBUG System InitializeDevice: DSM-DSID: 302ed89f43f0000000000e400000605700