[Case 1400904] Second multiplayer event system breaks Transition Color Tint

Unity Engine
,
1

The second multiplayer event system makes the buttons darker. And another effect - the buttons flash when the windows folder is on top of the game.
When I manually turn off second multiplayer event system - the colors are restored.
When I change button transition from Color Tint to none - shading disappears.
It looks like all colors are applied at once (Normal, Highlighted, Pressed, Selected, Disabled)

Windows 10 21H2
Unity 2020.3.27f1
Input System 1.3.0
Universal RP 10.8.1

7869394--999910--scr1.png
7869394--999910--scr1.png1920×1080 81.3 KB
7869394--999913--scr2.png
7869394--999913--scr2.png1920×1080 101 KB

2

Just checked, this bug is reproduced in the built-in render too. To reproduce the bug:

  • New 3D project
  • Create a Button
  • Delete EventSystem
  • Install Input System 1.3.0
  • Add Multiplayer Event System to Canvas
  • Select Player Root (Canvas)
  • Play
  • check color (ok)
  • duplicate Canvas
  • check color (the colors have darkened)
  • turn off one Multiplayer Event System
  • check color (colors restored)
3

In the version of Input Systems 1.2.0, the bug is not reproduced.

4

I think I found what causes this bug. CanvasGroup.interactable{ get; set; }
https://github.com/Unity-Technologies/InputSystem/commit/da6732ae05cea19b691043cb94f31bba79e09c2a#diff-cd2f6d202d9e3bbf493ee2cbc93b068453c63d1c4125dcc9dc3cfeb6ce93aa93R105

Additionally in the profiler I get every update too many (~36 from every MultiplayerEventSystem) UIBehaviour.OnCanvasGroupChanged in MultiplayerEventSystem.Update()

I get the same behavior if I add this script to a canvas group, without any input system, just a canvas group and a button inside.

public class CanvasGroupBreaker : MonoBehaviour
{

    CanvasGroup canvasGroup;
    void Start()
    {
        canvasGroup = GetComponent<CanvasGroup>();
    }
    void Update()
    {
        canvasGroup.interactable = !canvasGroup.interactable;
        canvasGroup.interactable = !canvasGroup.interactable;
    }
}

I hope this bug will be noticed and fixed by the unity staff. Or If you know how to get around this please tell me.

7871254--1000297--interactable.png

5

Same issue. Like a dummy, I worked around the zany coloring problems by redesigning all my Selectable coloring schemes. Then I coded around some of the other glitches, only to discover 2 more new issues.

6

Unity successfully reproduced this issue. Please vote.

2 Likes
7

Please, keep voting that issue, I sill have it in version 2022.1.7f1