Can I get some help (block regeneration)?

https://www.roblox.com/games/1093257255/Place

That is the place I am currently working on, a mining game. See everything works perfectly, except for block regeneration when clicking. I have no idea what is wrong as I have double checked and everything prints properly, etc so it definitely isn't getting hung up from what I can tell. However, there are still no errors & no blocks regenerate. It's uncopylocked so you can see everything, but I believe the issue revolves around this bit of code (ServerScriptService -> BlockRegeneration for the whole script):

    if (RegenerationPosition.Y <= 0) then
        return;
    elseif (RegenerationPosition.Y <= -6) then
        local Positions = {
            Vector3.new(6, 0, 0);
            Vector3.new(-6, 0, 0);
            Vector3.new(0, 0, 6);
            Vector3.new(0, 0, -6);
            Vector3.new(0, -6, 0);
        };
        for Key, OffsetPosition in next, Positions do
            local FinalPosition = (RegenerationPosition + OffsetPosition);
            if (not BlockDetect(FinalPosition)) then
                PlaceBlock(FinalPosition);
            end;
        end;
        return;
    else
        local Positions = {
            Vector3.new(6, 0, 0);
            Vector3.new(-6, 0, 0);
            Vector3.new(0, 0, 6);
            Vector3.new(0, 0, -6);
            Vector3.new(0, 6, 0);
            Vector3.new(0, -6, 0);
        };
        for Key, OffsetPosition in next, Positions do
            local FinalPosition = (RegenerationPosition + OffsetPosition);
            if (not BlockDetect(FinalPosition)) then
                PlaceBlock(FinalPosition);
            end;
        end;