Power BI visual substracting total negative numbers instead of summing up

Hi,

Hope someone can share some clarity on whats going on in my Power BI visual.

I have a column with amount which also concerns negative numbers.

When Power BI is summing up the total of negative numbers, it basically substract the amount.

See example below. -534,61 - -534,61 = 0. Instead it substract the amount to -1069,22.

The strange thing is that in another filtering the summed total is showing correct:

Wondering what is going on here. Does Power BI not recognize negative numbers only when summing up?

Thanks for your help.