you mean that intermittent network issue that corrupt the drive or something like it? Yes I had that also on the old synology nas DS216+II . I am not sure what to do with it. The advantage of time machine is beeing able to go back on file level to an old version though.Time Machine on Mac boot disk (not externals) to an old NAS (Lenovo ix2). Every so often the TM archive needs to be restarted following some issue. Hardly never used it.