OnDeinit and ObjectsDeleteAll Problrm

 
hello friend,
I think there is a bug in mql5 an DeInit section,
ObjectsDeleteAll(0) not working in OnDeinit.
Error is 4022
When I remove expert drom "Expert List" it is ok but when I remove from Right top side of chart it's not working.
Please see attached video .
Does anyone know what the problem is and how to ask Metaquotes to fix this problem?
Files:
deinit.zip  764 kb
 
You know what the problem is (4022). PICNIC.
 
Your topic has been moved to the section: Expert Advisors and Automated Trading
Please consider which section is most appropriate — https://www.mql5.com/en/forum/172166/page6#comment_49114893