We will investigate this issue and come back to you soon

Updated from our dev.team: The issue has been solved. Thank you for spotting the issue.

Below is the fix:

        <tbody>
            <?php
            foreach($this->dataStore as $i=>$row)
            {
                $rowStyle = "";
                if($this->paging)
                {
                    if($i<$this->paging["pageIndex"]*$this->paging["pageSize"] || $i>=($this->paging["pageIndex"]+1)*$this->paging["pageSize"])
                    {
                        $rowStyle.="display:none;";
                    }
                }			
                $this->renderRowGroup($groups,$i,count($showColumnKeys));
            ?>
            <tr ri='<?php echo $i; ?>'<?php echo ($rowStyle!="")?" style='$rowStyle'":""; ?><?php if($trClass){echo " class='".((gettype($trClass)=="string")?$trClass:$trClass($row))."'";} ?>>
                <?php
                foreach($showColumnKeys as $cKey)
                {
                    $cssStyle = Utility::get($meta["columns"][$cKey],"cssStyle",null);
                    $tdStyle = is_string($cssStyle)?$cssStyle:Utility::get($cssStyle,"td");
                    ?>
                        <td rv="<?php echo ($cKey!=="#")?$row[$cKey]:($i+$meta["columns"][$cKey]["start"]);?>" <?php echo ($tdStyle)?"style='$tdStyle'":""; ?> <?php if($tdClass){echo " class='".((gettype($tdClass)=="string")?$tdClass:$tdClass($row,$cKey))."'";} ?>>
                            <?php echo Table::formatValue(($cKey!=="#")?$row[$cKey]:($i+$meta["columns"][$cKey]["start"]),$meta["columns"][$cKey],$row);?>
                        </td>
                    <?php
                }
                ?>
            </tr>
            <?php
            }
            ?>
            <?php
            if ($this->dataStore->countData()>0) {
                $this->renderRowGroup($groups, $i+1, count($showColumnKeys));
            } else {
            ?>
                <tr><td colspan="<?php echo count($showColumnKeys); ?>" align="center"><?php echo $this->translate("No data available in table"); ?></td></tr>
            <?php	
            }
            ?>
        </tbody>