Build strategy for tags is not working, if you specify ignore tags lesser than 7days

Multibranch pipeline configuration on Automated build tags, Used Build strategy plugin

Added Tags–> Ignore tags older than as 1 (Events :No automatic build triggered for 1..

)

it works only if you specify as 7 days older.(Anything less than 7 is ignoring automated build trigger for tag)

Is this the expected one? shall we have a tags to restrict to build automatically only if that is less than one day too?