Data Visualization issue

Hello all,
I have some weird issue on grafana
When I would like to view data of the last up to the last 15 its fine
But when i would like to view up to the last 30 mins, some of the recent data goes missing.
These also gets worse if I increase the range and some might even have previous data missing.

This is definitely not a database issue as I am able to view the data perfectly.
Is there any solution to this?
Might this be a hardware issue? This is all running on an IPC and when I run it on a more capable machine, this issue goes away