DataStore system not saving when PlayerRemoved??

MODULE

local Module = {Data = {}}

local DataStoreService = game:GetService("DataStoreService");

local KeyPrefix = "data_user#";
local DataStore = DataStoreService:GetDataStore("TestData_v.15");

local DataTemplate = {
    Money = 300;
    Level = 1;
};

local function GetKey(id)
    return KeyPrefix .. id;
end;

Module.InitializeData = function(plr)
    local Key = GetKey(plr.UserId);
    Module.Data[plr] = DataStore:GetAsync(Key) or DataTemplate;
end;

Module.ConcludeData = function(plr)
    local Key = GetKey(plr.UserId);
    local Data = Module.Data[plr];
    if Data and Data ~= nil then
        DataStore:SetAsync(Key, Data);
        Data = nil;
    end;
end;

return Module;

SCRIPT

local DataModule = require(script.Parent:WaitForChild("DataModule"));

game.Players.PlayerAdded:Connect(function(Player)
    DataModule.InitializeData(Player);
end);

game.Players.PlayerRemoving:Connect(function(Player)
    DataModule.ConcludeData(Player);
end);

This is what I'm having trouble with. When in game and the data is changed, it works n all, but when i leave and rejoin, i have the default data.. It's tough because this used to be my method and worked like 100% of the time, and it just recently stopped.. Roblox did an update on studio not too long ago, could it be that??