Each time you re-open the project all arrays containing structures are disconnected. This bug only occurs when opening the project, before closing it, in fact, the project works perfectly and the pins are all connected, no errors reported by the engine.
This is just an example, every time I have to re-open each blueprint that uses that array type.
I’ve been searching through the various bug reports and it is not the first time that it happens: (Struct & Array Pins Disconnect After Saving & Reloading Project! - Editor Scripting - Unreal Engine Forums)
In my case it happens with both widget and actor blueprint. Maybe this bug reappeared again on this version.
Does anyone know how to fix it?