"mergeNonAdjacentRules" not works in some cases

[GoodDayForSurf]

Environment

• clean-css version: 5.3.2
• node.js version: v18.12.1
• operating system: Win10

Configuration options

var CleanCSS = require('clean-css');
new CleanCSS({"level": {2: { mergeNonAdjacentRules: true } } })

Input CSS

.selector .title {
  border: 0;
}
.wrapper .container {
  padding: 0;
}
.other{
   border-radius: 1px;
}
.selector .title {
  padding: 1px;
}

Actual output CSS

.selector .title {
  border: 0;
}
.wrapper .container {
  padding: 0;
}
.other{
  border-radius: 1px;
}
.selector .title {
  padding: 1px;
}

Expected output CSS

.wrapper .container {
  padding: 0;
}
.other{
  border-radius: 1px;
}
.selector .title {
  border: 0;
  padding: 1px;
}

If you replace border-radius with any other property, the merge will work as expected.