Hey Niraj,
I want to guess that the difference in numbers is a result of looking at different figures, or possibly some client-side interpolation, but I've been unable to replicate what you're seeing on my side, including the phenomenon of having a graph with no marker dot which still displays figures.
I'm wondering if you could
capture a HAR recording of your browser's traffic during viewing these graphs in your console, and send that to me privately using "Reply Privately". I'll be happy to take a look and attempt to determine what's going on from looking at that.
It's also strange that the 6 hour and 12 hour graphs don't seem to agree on the time at which the large spike occurred. In the 6 hour graph, it appears at around ~2:00 PM, while in the 12 hour graph, it appears at ~10:30 AM. Does that also look strange to you?
Feel free to send along the HAR in your next reply. Just know that generally, we prefer to handle such issue reports as these in a Public Issue Tracker forum. An issue like yours would be reported to the catch-all
Cloud Platform Public Issue Tracker.