Realtime dataset not working

Hello, how are you doing? I really need your help.

I have a streaming dataset with historic data turned on that is connected to a report using mixed stored mode. Below is a sample of the data in the realtime datatset and static dataset (import mode):

In the report, there is a measure to correlate the data from the realtime dataset to the static dataset and return the "Status" based on the value of the static dataset. The measure is:

test = 
var equip = FIRSTNONBLANK(Dados[Equipamento], 1)
var ident = FIRSTNONBLANK(Dados[ident], 1)
return CALCULATE(CONCATENATEX(RealTimeData, RealTimeData[Status]), FILTER(RealTimeData, RealTimeData[Identificador] = ident && RealTimeData[Equipamento] = equip))

This was working fine for about a month, until today, when a row that was in the realtime data was not retuning the "Status". 

Taking a deeper look in the formula, I was able to find out that if I replaced the variables "equip" and "ident" in the formula for strings of what I wanted to find, it returned the "Status":

 test = 
CALCULATE(CONCATENATEX(RealTimeData, RealTimeData[Status]), FILTER(RealTimeData, RealTimeData[Identificador] = "1" && RealTimeData[Equipamento] = "E&I - B1"))

Doing another test, I discovered that if I defined the variables and still use the string in the filter, it would not work:

test = 
var equip = FIRSTNONBLANK(Dados[Equipamento], 1)
var ident = FIRSTNONBLANK(Dados[ident], 1)
return CALCULATE(CONCATENATEX(RealTimeData, RealTimeData[Status]), FILTER(RealTimeData, RealTimeData[Identificador] = "1" && RealTimeData[Equipamento] = "E&I - B1"))

Note: this situation only occurs if I am looking for the value "E&I - B1" in the column "equipamento" and the value "1" in the column "Identificador", with all the other values the formula works fine.

I managed the solve this issue by deleting all the data in the realtime dataset and re-uploading again, without any changes in the formulas. However, this is not a viable solution if this happens again, so, I would need your help in a more permanent solution to this issue. 

Thanks in advance.