BUG. Chests and monsters are disapear at expedition map

After i am dying during a boss fight, all chests and monsters disappear from the expedition map. Bomb exploded near boss and i enter in it. Before i enter explosions is still continue. Then got killed by boss, then kil the boss and then chests and monsters disappear at the map then i come back to map.

So, then i come back to map i saw at map - clear map with 3 icons: boss and 2 dungions. I can't enter to dungeons, they are closed, but i opened it before.
At screen you can see minimap (sorry for map transparence/