Is the black ice in the frost keep no longer mineable. I ran through the whole thing and the nodes are there but now you pass right through them. With the increase of black ice cost for buildings on top of extreme reduction in availability of resources building or repairing black ice buildings is impractical.
Steps on how to reproduce issue:
1.Go to Frost Keep
2.Equip Tool
3.Hit Node as if it were air.
4.Wonder how you will be able to build out of black ice ever again.