"GetRandomInNavigatableRadius" and "GetRandomReachablePointInRadius" functions is buggy

Hi guys… i’m new here, looks like found bug in engine. Seems “GetRandomInNavigatableRadius” doesn’t work propertly, i’m trying to call more the once with event tick node and delay, then move actor to this rnd location several times with int incrementing, but after first iteration it returns the same number. “GetRandomReachablePointInRadius” seems also affected… until somebody in developers team will fix or somebody will tell i’m idiot and won’t buy me a beer :), please, can y help me to make the construct the same kind of function with blueprints based on math logic (if it’s of possible i guess)? Unreal engine version is 4.22.3, seems last one public release. Thanks.