World override not overriding

ive made two hud blueprints that i want in separate levels however. ive selected a hud blueprint within the world settings to override the project settings’ hud however when i save my progress and reload the level it goes back to being overridden by the project settings and the settings i made for the world settings to override this have disappeared. im currently working on version 4.5 as this was the version available when i started. is there something im doing wrong?
images to further my explanation:

initial settings: no world override set

world override chosen with different hud blueprint

reload level and it has now reset back to project settings and there is no override in world settings

30338-prob3.png