text display on bottom when use angular material autocomplete text box?

I work on angular 9 I face issue on angular material auto complete

issue is when select Item from auto complete angular

text display on bottom of page .

and angular autocomplete text box is on header

the text display correctly but is so far from control text box


    
   
   
     
     
       
          {{exp.itemName}}
       
     
     

 


issue as image below : text is so far issue