CalculateTable is empty on visual but corresponding Calculate shows correct row count

[alsm]

If I write Calculate with filter, create a visual card and select date, it shows correct count

Num_SelectDetailsRows =

VAR select_date = SELECTEDVALUE(EomDates[Date])

VAR filt_headertbl = CALCULATETABLE(VALUES(HeaderTbl[HeaderKey]), FILTER(HeaderTbl, [ValidFrom] <= select_date && [ValidTo] >= select_date))

VAR filt_detailstbl = CALCULATE(COUNT(DetailsTbl[DetailsKey]), DetailsTbl[HeaderKey] in filt_headertbl)

RETURN

 filt_detailstbl

However, if i convert it into a table and show on visual it shows empty

Table =

VAR select_date = SELECTEDVALUE(EomDates[Date])

VAR filt_headertbl = CALCULATETABLE(VALUES(HeaderTbl[HeaderKey]), FILTER(HeaderTbl, [ValidFrom] <= select_date && [ValidTo] >= select_date))

VAR filt_detailstbl = CALCULATETABLE(DetailsTbl, DetailsTbl[HeaderKey] in filt_headertbl)

RETURN

 filt_detailstbl

Sample data is 

HeaderTabl

HeaderTbl
HeaderKey	ValidFrom	ValidTo
H1	1Jan2022	31Dec2022
H2	15Feb2022	31Oct2022
H3	10Mar2022	15Sep2022
H_FebOnly	7Feb2022	25Feb2022
H_FebMar	25Feb2022	14Apr2022

DetailsTbl
DetailsKey	HeaderKey	Name	Currency
D1	H1	A	EUR
D2	H2	B	GBP
D3	H3	C	AUD
D4	H_FebOnly	D	GBP
D5	H_FebMar	E	USD

Dates I try in slicer

Date

31 Dec 2021

31 Jan 2022

28 Feb 2022

31 Mar 2022

30 Apr 2022

31 May 2022

30 Jun 2022

31 Jul 2022

31 Aug 2022

30 Sep 2022

31 Oct 2022

30 Nov 2022

What am I missing?

[amitchandak · Accepted solution]

@alsm , A calculated table, can not take the slicer values. that is why the table is empty