disappears after postback

[sener]

asynupload disappear after postback but its still there when click on position its appear again this occur today after telerik update to new version
any idea?

[sener]

Any idea ?

[sener]

I think this is a bug and how can I fix it . In addition sometimes its not working properly. Can I install only asyncupload? Please help I will going to live envirenment soon!