How to Display Null Count on a Card Visual

Hi All,

I am doing a report for IT Tickets. I am trying to display the number of tickets that have no responses via name slicer; either [typeR] = null or [typeR] = "R". However, PowerBI is treating it as if the blanks don't exist. When I try to filter the card by blanks, only R comes up as an option. 

I have tried COUNT(DISTINCT)\DISTINCTCOUNT() but it returns 1, I know there are 1035 blanks from a count in Power Query. 

I have tried

NoResponseCount =

CALCULATE(COUNTROWS(ResponseMerge),FILTER(ResponseMerge,ISBLANK(ResponseMerge[typeR])))

But this returns nothing. The card says (BLANK). Many other measures I have tried return this as well, inlcuding the Quick Measure 'Filtered Value' that's built in.

I have also tried adding a binary variable where No Response = 0 and Response = 1 however, the 0's are not counted. 

The only one that seems to work is 

NoResponseCount = COUNTROWS(FILTER(ALL(ResponseMerge), ISBLANK(ResponseMerge[typeR]) || [TypeR]=""))

But the card displays 1036 when there are 1035 blanks. It also doesn't slice with the names. I know you will say "Are your table relationships correct?". They are because when I use 

NoResponseCount = COUNTROWS(ALL([Table]) - COUNTROWS(FILTER([Table],[Table][typeR] = "R")) the slicer works, but the number that is displayed is incorrect when using the name slicer. 

I thought I should mention that the nulls that are in [typeR] are also in every other column, I changed these to 0's instead but that still did not solve the problem. I also have no page nor report filters. 

Any help would be greatly appreciated. I have been stuck on this for 2 days 😞