had dragged, how to update coverd area

Start by reproducing the drag interaction involving Draggable inside Popup and EdgeLabelRenderer, using the provided component structure. Investigate why the Popup's previous area remains covered after dragging; done means the old area is cleared without breaking dragging or the popup display.

I use mui Unstable_Popup component that could drag on the react flow component. Its draged well, but the old area of Unstable_Popup remain coverd. How to erase this area? Thks.

return (
<>
    <BaseEdge path={edgePath} markerEnd={markerEnd} style={{stroke:color}} />
    <EdgeLabelRenderer>
        <div
        onClick={handleClick}
        style={{
            position: 'absolute',
            transform: `translate(-50%, -50%) translate(${labelX}px,${labelY}px)`,
            fontSize: 12,
            // everything inside EdgeLabelRenderer has no pointer events by default
            // if you have an interactive element, set pointer-events: all
            background: '#ffcc00',
            paddingLeft: 10,
            paddingRight:10,
            paddingTop:4,
            paddingBottom:4,
            borderRadius: 5,
            fontWeight: 700,
            pointerEvents: 'all',
        }}
        className="nopan edgeObject"
        >
            {label}
        </div>
        <Popup id={id} open={open} anchor={anchorEl}>
            <Draggable handle='.handleEdge'>
                <Paper><ForwardPanel handleClose={handleClose} pair={t} {...props} /></Paper>
            </Draggable>
        </Popup>
    </EdgeLabelRenderer>
</>
);

<Paper className='handleEdge' sx={{backgroundColor:pink[50], cursor:'pointer'}} >
    <Stack direction="row" spacing={0.6} display='flex' alignItems='center' padding='4px' borderBottom='1px solid #E8A7D5'>
        <Box whiteSpace='nowrap' overflow='hidden' textOverflow='ellipsis' maxWidth='8em'>{source}</Box> 
        <ArrowForwardIcon sx={{color:grey[400], fontSize:"1em"}}/> 
        <Box whiteSpace='nowrap' overflow='hidden' textOverflow='ellipsis' maxWidth='8em'>{target}</Box>  
        <IconButton onClick={props.handleClose} sx={{marginLeft:'auto !important', padding:"0", fontSize:'1em'}}><CloseIcon color='primary' />  </IconButton >          
    </Stack>
</Paper>