Network ClientRPC syncing latency

I’m having a problem syncing an event right on time. Can this somehow be reduced/resolved?

The problem occures as well when a Unityeditor on PC is the server. Strangely, the PC as a client is always right on time, no lag there. Is it a android/mobile/powersafe/wifi issue? This happens in a local wifi. Im using LocalDiscovery to connect. Ping shows 3-8ms.

code is pretty straightforward:

 //This is called from UI Button
    [ClientRpc]
    public void RpcShowTestImage() {
        if (isServer)
            return;
        if (!testImage)
            testImage = FindObjectOfType<TestImage>();
        testImage.ShowTestImage();
    }

public void ShowTestImage() {
        transform.position = Camera.main.transform.position + Camera.main.transform.forward * 1.5f;
        transform.rotation = Camera.main.transform.rotation;
        r.enabled = true;
        timer = 3;
    }

And here’s my networkmanager

Hope someone can help.

Change minUpdateTimeout from 100 to 1 please