CODESYS - the IEC 61131-3 automation software

INTERFACE Interface1_ITF
//contains properties: Prop1, Prop2

INTERFACE Interface2_ITF
//contains properties Prop3, Prop4

FUNCTION BLOCK FB_1 IMPLEMENTS Interface1_ITF

FUNCTION BLOCK FB2 EXTENDS FB1 IMPLEMENTS Interface2_ITF

My question is, when I go online with a project, in FB_2 I will see the properties from the first interface twice
Prop1
Prop2
Prop1
Prop2
Prop3
Prop4

I don't understand why. I should see Prop1 and Prop2 because FB_2 is extending FB_1, and I should see Prop3 and Prop4 because it's implementing Interface2_ITF. Why are Prop1 and Prop2 shown twice?

thanks

Tim

Interesting. It turns out that when you clock "Implement Interfaces" on a function block, it automatically creates all properties, including ones from base function blocks. I assumed that that was how it was supposed to be, but it looks like if you do that, you'll get the issue I was having.