Time Entries - Does not work

Time entries often just doesn’t seem to work. I have all time spent ‘writing’ to be logged against a project. But when I go to the calendar view it often does not include that time against the project. This has happened 2 days in a row. I go to a coffee shop and work on my Mac, then when I come back to work on my PC I see that no time was recorded against the project despite seeing the Rize correctly recorded the time against the write app and category. It could be due to the dodgy internet connection I have when working remotely via hotspot.