WebGL context restored incorrectly (pixi v5)

[YuryKuvetski]

Everything works fine for pixi v4, but in v5 (WebGL 2) application restored incorrectly

Expected Behavior

For both versions of pixi, application should be restored correctly.

Current Behavior

If you choose v5 pixi version with webgl2, application is not restored.
If you choose v4 pixi version with webgl, application restored fine.

Steps to Reproduce

1. Open https://pixijs.io/examples/#/demos-basic/container.js on PC Chrome
2. Choose v5 pixi version
3. Open chrome dev tools console with iframe context
4. Write next command to lose webgl context document.querySelector('canvas').getContext('webgl2').getExtension('WEBGL_lose_context').loseContext()
5. Wait for a few sec
6. Write next command to restore webgl context document.querySelector('canvas').getContext('webgl2').getExtension('WEBGL_lose_context').restoreContext()

Environment

• pixi.js version: 5.0.3
• Browser & Version: Chrome 74.0.3729.157
• OS & Version: MacOS Mojave 10.14.4

[ivanpopelyshev]

Its a known issue. I've fixed geometries but not texures and shaders :) How critical is that for you, is it something that you can integrate into app a month after now or do you need it this week?

[YuryKuvetski]

Good. I think it's ok for us to wait a month.

[JetLua]

@ivanpopelyshev Are you already doing this? If not, I can add a PR.