Hi Husnul,
Maybe you can something like this:
Step1

create Input Parameter(SelectedId) in ShowTrackRequest...and assign SelectedCapExRequest=SelectedId
Step2

Assign/Pass SelectedCapExRequest to the Logs block instead of passing GetCapExRequestsDetails.List.Current.CapExRequest.Id (This is will always pass the same value to block..because your popup is outside of the list, so there is no iteration and always take the first record id).
Step 3
Add isStart input parameter in Logs block (Use to trigger OnParameterChanged) - need this extra input parameter because CapExRequestId's value is same before and after popup is displayed so OnParameterChanged will not trigger.
-add start event.
-add onready to call start event.
Please find the attached OML for your reference.
i hope this will be helpful for you,
Best regards,
Aqil