Variable not getting refreshed inside a!refreshVariable

I am trying this piece of code but it is just executing while loading the interface and it is never getting refreshed after that.

local!refresh: a!refreshVariable(
value: rule!NGS_queryMerGenerationData(
executeWhen: true,
pagingInfo: a!pagingInfo(startIndex: 1, batchSize: - 1)
) ,
refreshInterval: 0.5
)

Can you please help regarding this?