[wpe-2.28] CSS - drop-shadow filter problems #937
Description
In BBC test suite there are 2 test cases using drop-shadow filter in different contexts:
https://certification.bbctvapps.co.uk/act/test/ui/187/css-supports-shadows/
https://certification.bbctvapps.co.uk/act/test/ui/187/css-supports-filter/
In both cases, latest WPEWebKit 2.28 (and even latest WebKit/WebKit@3142453) randomly yield wrong results.
This is expected outcome:
And that's how it looks like occasionally:
To me it looks like some compositing issues - once the CSS properties are poked a bit from web inspector, the shadow is being painted correctly.