In a game I am making, the player is allowed to place down floor pieces. He can click a button to join those pieces together to stop the rendering interference. On the first union, everything goes smoothly, but if you try to union a union to another part, a piece of the union breaks off and teleports to a random position. Does anyone know why this is happening?
Not sure. Sounds like a glitch. Does this happen often or is this a first time? 
It happens every time. Also, when I union the first parts, imagine i union part1 and part2. Then when i union the parts of union12 and part3, the section of union 12 that used to be part1 gets moved, while part2 stays in place
I am sure there is a MAX amount of Unioning. Have you hit it? I am sure its a BETA thing to make all games easy to access by all and more enjoyable.?
Sounds like a script issue actually… maybe post the script that allows the unioning.
Nvm, I figured it out. Apparently I had been trying to union something to itself…thanks though guys!