M-Files REST/API Query Problem via Last Modified Date

Hey There,

We' re conducting a REST API search to m-files API like;

{{MFWSUrl}}/objects?p21>>=2018-06-22T12:29:04&p21<<=2018-06-22T18:29:06Z

By using the search suggestions in developer portal when we execute the search like that with the timestamp "2018-06-22T12:29:04" a result which is last modified on that specific timestamp is returned although it is a greater then search only but when we include the miliseconds in our search like;

{{MFWSUrl}}/objects?p21>>=2018-06-22T12:29:04.6000Z&p21<<=2018-06-22T18:29:06Z


Then the object that recently returned is not being returned. Since M-Files API responses only returns seconds part but no miliseconds how are we supposed to use greater then operator accurately? Please see the screenshots

Thanks in advance.

PS. COM API behaves the same