Nested masked UI elements does not updated correctly when mask is disabled and re-enabled

[tch0m]

Updated by @yaustar : Wed 16 Nov 2022

Project: https://playcanvas.com/project/1009169/overview/double-masking-issue

In the launch tab

Press Space to toggle the mask property of Entity 'Mask' off

Press Space to toggle it on again, mask doesn't not render correctly

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We've found an issue with masked elements in the editor. If a masked element inside another masked element is set to mask false then back to true, the editor does not apply the mask. Refreshing the browser window gets it to display correctly.

Steps to Reproduce

1. Have an image element with mask set to true as a child of another image element with mask set to true
2. Disable the mask of the inner masked element
3. Re-enable the mask, it appears as a white box

mask-in-mask-bug.mov

[yaustar]

Looks like this is actually an engine issue as this happens at runtime too. Updating the first post with example

[mvaligursky]

possibly related too https://forum.playcanvas.com/t/runtime-bug-with-ui-masked-elements/35054