Map collapsing during session (due to different seemingly unfixable causes)

Summary

Recently published a 1v1 buildfight map, I wanted to do some minor updates in UEFN, but when I tried running the game all of a sudden the explosive device nukes my whole map. I also can’t place builds in some areas. Whenever I am able to place a build, it activates builds on the whole map, but whenever I delete this exact piece, it destroys everything in the map. I tried it in a different map, but I have the same problem here. I’m clueless

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

World Building

Steps to Reproduce

build a map, place some floors etc.
use a explosive device, connected to a reset button, disable destroy for certain objects etc.

Expected Result

my map functioning well

Observed Result

my map basically explodes

Platform(s)

windows

Island Code

9224-3073-6507