output css file error of border rules

[yinsang]

entry:
.aaaaaaaaaa{
border:1px solid pink;
border-top:1px solid green;
border-right:1px solid black;
}

output :
.aaaaaaaaaa{
border-color:green #000 pink pink;
border-right:1px solid pink;
border-style:solid;
border-top:1px solid pink;
border-width:1px
}
Actually,it goes wrong!
versions:
webpack 4.16.3
optimize-css-assets-webpack-plugin:5.0.0

if I code this as

{
border:1px solid pink;
border-top-color: green;
border-right-color:black;

}
It works!

[matanarbel-startapp]

@yinsang - it's a bug in the postcss-merge-longhand optimizer of cssnano@4.0.2.
It's fixed in cssnano@4.0.5 (see the release page).
I think it's a good idea to update the cssnano dependency version.

[yinsang]

@matanarbel-startapp,thanks a lot for your comment.
I also think it's a good idea to update the cssnano dependency version to the latest.@NMFR