This fixes the Bug/Problem that triggers are set to "loop" when you place a Blueprint or Workshop item.
TLDR:
1. Place BluePrint were you want it to be.
2. Select everything (press "i" on Keyboard) and delete it.
3. Undo (CTRL+Z or Germany STRG+Y) to get it back.
4. Triggers should now work as they are supposed to.
Thx to the channel tagi3D for his tip, got this knowledge from him.
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