Bug After a while, UI Element disappeared

The game is hung in runtime mode in the editor. I went to play a mobile game and came back to find that the UI element disappeared,was released?

UI Element Runtime Version:1.0.0-preview.6

Unity Version : 2020.2.0a16

It should be about half an hour later(What exists now is UGUI):


Normal:

 

The problem is not because of a long-term problem, but because multiple UIDocuments exist, and then all UIDocuments before him are destroyed, the problem will occur

 

Reproduce the problem

 

1.0.0-preview.7 this bug Still exist

unity version:2020.2.0a21

 

I am getting a similar issue when I made a menu system. The UIDocuments in my case are setting style.display to none on the root element, nothing is getting destroyed. I submitted a bug report already for this and it was confirmed.
https://issuetracker.unity3d.com/is...ot-visible-after-being-pressed-multiple-times. It's not just button elements but all elements, not sure about the teleporting to 0,0,0 cause I can still interact with the UI with it not showing up. Everything is where it should be, just not shown.

 

The hierarchical structure was destroyed before him, it was not destroyed by itself,code It's just that the Root Display of UIDocuments before him is set to `None`,In the third reply, I recorded a GIF to demonstrate how to quickly reproduce the problem. Create multiple UI documents and then destroy the previous uidocuments to reproduce the problem

 

The link could not be opened

 

I wrote a simple project. You can take a look at it. It is slightly different from how the problem occurred in my project, but it can trigger this problem. I cannot simulate the way the problem occurs in my project. Sorry ==, The way my project appears is very simple, that is, open the ui and then destroy the previous ui, but I cannot trigger the problem in this way in this project.

You can right-click the `UIDocumentsTest` component and click `Auto` to see the result, or you can see how I triggered this problem step by step in the gif

 

I solved this problem by instantiating `panelSettings`

Code (CSharp):

1. void Awake()
2. {
3. GetComponent<UIDocument>().panelSettings = Instantiate(GetComponent<UIDocument>().panelSettings);
4. }
5.  

 

You're welcome