Hey mate,
During the day staff are less active due to mostly work and school especially in this period of time as exams are taking place in pretty much every state.
All our staff are here voluntarily and are giving up their time, however, we have to understand that people have things going on in there lives outside this community witch fill the timeframe of the 8am - 3pm when you are experiencing these issues, therefore, we don't have as many staff on.
Is there a fix? In my opinion no not really as said above every staff is here on there own accord, no one forces them to do it therefore we cannot "force" staff to work selected hours/time frames.
On the bright side, we have school holidays coming up in a couple of weeks and they last for about 2 months so expect more staff to be on over that period of time.
As said above by @Xeylious, If no staff are online you can fill out a report here: https://strayagaming.com.au/support/ and staff will take a look at in when they are on.
Cheers,
Excel