jQuery Grid Plugin - jqGrid

jqgrid version 4.5.2

I implemented virtual scrolling on a search page (see code below).

Search results returned 64 results. When I scoll to the bottom, I first see "View 1 of 64″. If I scroll up a little and then back to the bottom again, the text changes to "View -3 of 64″ and I see duplicate rows added to the table. If I do this a second time, the text changes to "View -7 of 64″ and additional duplicate rows get added. Subsequent scrolls to the bottom have no further effect.

After a lot of digging, I found what I think was the issue. On line 968 of jquery.jqGrid.src.js

if (p.lastpage && (page > p.lastpage || p.lastpage===1 || (page === p.page && page===p.lastpage)) ) {

    return;

}

page comes in as a string, while p.page and p.lastpage are numbers, so the triple equals in that last part of the if statement always returns false, allowing execution to continue to where the populate function gets called again (twice). It's not until page exceeds the value of p.lastpage that subsequent calls to populate are prevented.

If I change the "===" to "==" the scrolling begins to work as I expect.

Can we get a fix that either sets the type of page to "number" to match the type of p.page and p.lastpage ("number"), or, alternatively, change the "===" to "=="? Or if there's some jqGrid option I can set to get the behavior I'm expecting, please advise.

jqGrid code:

            $('#someTable').jqGrid({
                url: 'some.json',
                datatype: 'json',
                height: '440px',
                shrinkToFit: false,
                headertitles:true,
                width: gridWidth,                
                colNames:[    'Col 1',
                            'Col 2',
                            ...
                colModel:[    {name:'foo',index:'foo', width:170, sortable:false},
                            {name:'bar', width:70, hidden:true},
                            ...
                rowNum:20,
                scroll:1,
                loadonce:false,                
                mtype: "GET",
                viewsortcols: [true,'vertical',true],
                viewrecords: true,
                sortorder: 'desc',
                pager: '#someTablePager'
            });