non accessible objectives

i get its early access but if youre going to design parts of the map that can not be accessed can you also ensure objectives can not spawn in said areas. this is the third objective i could not access. as well, i have run into multiple occasions where im clearing a map with a map boss, and i end up locked in the boss arena when the fight is complete. if i have not cleared every rare monster before this, i am unable to complete the map and it need to be reset. please fix.

https://i.postimg.cc/Y0y2zKPB/screenshot-0001.png