Heartbeat lags behind while in a server?

Hi. I'm trying to make a sword.

The problem I'm having is with Roblox's Heartbeat feature, as it is lagging behind while in a server. What I'm trying to do here is constantly keep the sword's handle at the player's right hand (R15) using Heartbeat to keep the position and orientation the same as the player's right hand. It works flawlessly in studio, but when I test it in an online server it only updates around 10-15 times per second. Then i got a few people join, and it only updated around 1-5 times per second. I do believe this issue is occurring on Roblox's side. This is really confusing and I would like to know if there's a solution. Thanks!

The script is located inside the sword (Single union) and the variable "player" is a textlabel in the worksapce. here it is below:

game:GetService("RunService").Heartbeat:Connect(function()
    local player = workspace.name.Text
    if workspace:FindFirstChild(""..player.."") then
        script.parent.Transparency = 0
        script.parent.Position = workspace[""..player..""].RightHand.Position
        script.parent.Orientation = workspace[""..player..""].RightHand.Orientation
    else
        script.parent.Transparency = 1
    end
end)

edited because what I asked before made absolutely no sense