This bug exists for 4-5 weeks and completely brakes an already bad phase in this dungeon.
1. After pushing fishes to towers.
2. whale boss disappears or is visualized somewhere outside the map

3. impossible to hit the boss, group is forced to swap server and restart

4. also fishes and towers may randomly appear and disappear

This whale boss fight sadly was never good.
Hit box, is very small, depends on angle and mouse coursor.
Fishes register hits on opposite side or some random angle, thus pushing them in random directions. Just make it pick up and carry or something else.