GetMouseButton incorrect after a few seconds

Hello,
I simply want to know if the mouse is held down, so I can do mouseMove actions when the mouse is held down and dragged. But I noticed that the GetMouseButtonUp was not always triggered, so I added !GetMouseButton to perform an extra check. But when I hold the mouse down for more then 3 seconds, GetMouseButton returns false, even though the mouse is pressed down.

Stripped version of the code,
Tested on unity 2018 and 2019:

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class TestMouseDown : MonoBehaviour
7. {
8.     bool mouseDown;
9.  
10.     private void Update()
11.     {
12.         // Mouse Click
13.         if (Input.GetMouseButtonDown( 0 ))
14.         {
15.             mouseDown = true;
16.         }
17.  
18.         // Mouse Up
19.         if (Input.GetMouseButtonUp( 0 ))
20.         {
21.             mouseDown = false;
22.         }
23.         if (!Input.GetMouseButton( 0 ))
24.         {
25.             mouseDown = false;
26.         }
27.  
28.         Debug.Log( "mouseDown: "+mouseDown );
29.     }
30. }
31.  

 

That's bizarre. I've just tested using this:

Code (csharp):

1.  
2.     public bool tester;
3.     private void Update()
4.     {
5.         tester = Input.GetMouseButton(0);
6. }

And it behaves as expected, with the "tester" bool remaining true after 3 seconds of holding down the button.

Is it possible this is something specific to your hardware? Could you try a different mouse and/or different computer? What OS are you using?

 

I am using a 2017 iMac osx 10.13.6, with Logitech mouse. I don't have another mouse to test.
I used several online mouse check pages like this one (JavaScript based I assume), and no problem there.

 

Problem solved:
I installed the Logitech Unifying Device software and re-paired my mouse to the computer, that solved my problem.

 

My computer runs Mac OS X 2019, and I use a Razer mouse. It's not possible for me to test another mouse. There was no problem using several online mouse check pages like this one (JavaScript-based, I assume).