Undergames: Volcansnow, won't proceed after destroying all the core shards.

All the 4 shards were destroyed however Draven's dungeon core and doors were still alive, after reloading the save then his core was destroyed. However the map won't proceed despite that all the shards were destroyed (except mine.)

Savefiles

I think these should be those saves
1 group stage volcansnow_20180803165247

.

before reloading

20180803163943_1.jpg

This is after reloading, reloading the save again would remove those four "alive" core shards.