Steps to Reproduce

1. import keikai-601.xlsx

        <spreadsheet id="ss" hflex="1" vflex="1"
                     showSheetbar="true"
                     src="/issue/keikai-601.xlsx"
        />
        <zscript><![CDATA[
        Sheet selectedSheet = this.ss.getSelectedSheet();
        Ranges.range(selectedSheet).setFreezePanel(6, 0);
        ]]></zscript>

2. reduce browser width to show column M as the right-most column
3. scroll to the right fast. see scrollFast.mov
it's easier to reproduce it with firefox because firefox will automatically scroll to the last scrolling position for you after page loading

Current Result

texts in BJ ~ CW are missing

Expected Result

BJ ~ CW have texts

Debug Information

• if you scroll to slowly, the bug doesn't happen. see scrollSlow.mov
• there are hidden columns between AJ ~ CW