Missing data on graphs

Hello Team  ,

I am encountering issue with missing data when we have intermitting issue with our internet . 

i have checked the Agent config file and these are enabled. 

# Reporter persistent queue switcher (true/false)
reporter.persistent.enable=true
# The maximum time to cache data to be reported, default is 30(minutes)
reporter.persistent.expire=30 have 4 probes onsite . 

We have 4 probes on site .  Interruption to the internet should not cause missing gaps in the devices monitoring . 

If you could access our company portal . The time is yesterday 29th/ April  betweem 8:00am to mid-day.

Please advise .