Is there anyone who works in Core open alpha language Lua?

Question

Lua

the task is, if the player enters the trigger, then the object in the trigger disappears.
Simplified the code to elementary .

function a(trigger, object)
if a ~= trigger and object:IsA("Player") then
trigger:Destroy()
end
end
script.parent.beginOverlapEvent:Connect(a)

I was terrified, but the network button turned on the code works, everything works, it works on the wall.
I go to the publication does not work.
What's wrong?
already simplified the code to a primitive ....
In the game it works, you approach the wall, it disappears, after publication it either works once or does not work at all
Who worked with Core open alpha ? tell me what is the problem? why does it work for me and on my wall, but when in a group it doesn't work?