Hi,
I don’t know if this is intended, but when I am using a structure in a blueprint, and alter a property name in the structure, this pin disconnects in all blueprints, and I have to manually find and connect them again.
I have tested in 4.4.2 and have made a git repo with the source for at demo ex.
In this demo try alter the property name in Test_Struct and it should disconnect in the level blueprint.