What happened to traces?

by Sean007 posted Jul 29, 2018
The number of traces when farming seems to have gone down (if not stopped entirely), and I notice I’m harvesting light blue crystals of some sort instead- since when did this change, and what are these blue crystals for? I’m sure I missed an announcement... also, when I look at my inventory, they aren’t in there so I can’t see a description of what they are.