Peculiar drop in requests

Community Explorer

Relatively new to Canvas Data, so pardon my ignorance if this has come up previously (though I didn't find anything in my search). We created a report on requests by hour and day of week. When looking at it, we see a drop in requests every day of the week 4-5pm (Pacific Time).

259335_requests by time of day (20171015-20171021).png

I haven't dug into this in any detail, but figured I'd ask here. I know the requests table is generated from log events and isn't guaranteed to be accurate, just wondering if there are known issues with particular time periods missing data?