In short: Don’t put Nydiamar items into the Shared Stash. Equipment and components are fine.
There is a significant issue when someone puts the Defense Materials (that can build a defensive tower next to you) into their Shared Stash (not the normal one!). So don’t that.
I assume all Nydiamar items that are used by destroying them will have this same issue, so don’t put them in there either. These are probably all such items:
- Defense Materials
- Binding Stone
- Capture Apparatus
Beutekugeln should be fine.
Summon Stash spawns the stash on log-in when put into the normal stash. Weird, but not really an issue. Remove it from the stash should it start randomly getting summoned. Fixed.