Duplicate attributes in the same tag or id or class were getting removed after compiling less to css

[VaibhavShukla]

Actual Input in .less file

body, html {
/* IE<10 Scrollbars */
scrollbar-3dlight-color:;
scrollbar-arrow-color:;
scrollbar-base-color:;
scrollbar-darkshadow-color:;
scrollbar-face-color:;
scrollbar-highlight-color:;
scrollbar-shadow-color:;

/* IE10+ Scrollbars */
-ms-scrollbar-3dlight-color:;
scrollbar-arrow-color:;
-ms-scrollbar-base-color:;
-ms-scrollbar-darkshadow-color:;
-ms-scrollbar-face-color:;
-ms-scrollbar-highlight-color:;
-ms-scrollbar-shadow-color:;

}

after converting result of Css File

body,
html {
/* IE<10 Scrollbars */

scrollbar-3dlight-color: ;

scrollbar-base-color: ;
scrollbar-darkshadow-color: ;
scrollbar-face-color: ;
scrollbar-highlight-color: ;
scrollbar-shadow-color: ;

/* IE10+ Scrollbars */

-ms-scrollbar-3dlight-color: ;
scrollbar-arrow-color: ;
-ms-scrollbar-base-color: ;
-ms-scrollbar-darkshadow-color: ;
-ms-scrollbar-face-color: ;
-ms-scrollbar-highlight-color: ;
-ms-scrollbar-shadow-color: ;
}

As from the example you can see I have created properties for different different browsers for body,html tags and after conversion the " scrollbar-arrow-color:;" is getting deleted from "/* IE<10 Scrollbars / " and present in "/ IE10+ Scrollbars */"

Could please let me know if there any changes can be made to pom.xml.