Ignition Historian Question

Hello,

I'm historizing one tag with Sample Mode as "On Change" and other parameters for History settings are as default.

However, When I tried to fetch the data for that tag, I am seeing multiple rows with different time stamp with the same value.

Tag Type: BOOLEAN

My question is why Ignition is historizing if the setting is Sample at "On Change" and values are same?

Thanks in advance!!!

I'm attaching screenshot for historized data