GroupBy Header duplicates and doesn't update when scrolling in a DropDownList

Question

Good afternoon,I'm having an issue with the SfDropDownList component, it has a GroupBy field and the GroupBy Header shifts upwards when you start scrolling - and gets stuck there at the top.Please see here for examples:I have also noticed that if I change the datasource for the DropDown, to one that does not contain the stuck GroupBy Header - it still stays there over the correct one:This is using the current latest version (v18.1.44), and I have tried with a simple dropdown too. I've tried removing all Filtering, Events, PopupWidth and even making a new Grouping Template, but it still happens. Here is my code for the above:Any help is much appreciated. Kind regards,Tom

Berly Christopher · Answer

Hi Tom, 
  
Greetings from Syncfusion support.  
  
We were able to reproduce the reported issue by below mentioned replication procedure.  
  
·       Scroll the items in the popup 
·       Close the popup 
·       Open the popup again 
·       Duplicate headers are created.  
  
If you are facing the issue by above mentioned way means, we have logged this as an issue at our end and this fix will be included in our patch release scheduled on 6th May 2020. You can track the status of the reported issue from the below feedback link.  
  
Feedback: https://www.syncfusion.com/feedback/13814/  
  
Else, if you are facing this issue in any other ways means, please share the replication procedure to reproduce it at our end and provide the solution earliest.  
  
Regards, 
Berly B.C