Command not recognized error while executing element.findElement(locator)

[VladislavShcherba]

Hello!

I've got some rare floating issue when executing element.findElement(locator) using Java language binding, WinAppDriver v1.2.1.

It can throw org.openqa.selenium.UnsupportedCommandException, and then the corresponding driver logs are:

==========================================
POST /session/CC36BFBE-AC57-4F8A-9018-A7F0B4CDB913/element//element HTTP/1.1

Accept-Encoding: gzip

Connection: Keep-Alive

Content-Length: 76

Content-Type: application/json; charset=utf-8

Host: 127.0.0.1:4723

User-Agent: selenium/3.141.59 (java windows)




### WinAppDriver::CommandHandler::Element::HandleCommandAsMidPoint - Command  is not recognized
HTTP/1.1 404 Not Found

Content-Length: 153

Content-Type: application/json



{"status":9,"value":{"error":"unknown command","message":"Command not recognized: POST: /session/CC36BFBE-AC57-4F8A-9018-A7F0B4CDB913/element//element"}}


==========================================

As you can see there is a missed {element id} in the URI "/session/{session id}/element/{element id}/element":
POST /session/CC36BFBE-AC57-4F8A-9018-A7F0B4CDB913/element//element HTTP/1.1

How it even possible that the client sends inappropriate request to the server other than there is an issue on WinAppDriver Java client side?

I would expect to see some not empty {element id} in the URI and StaleElementReferenceException or NoSuchElementException for example, but definitely not UnsupportedCommandException.

So my question is if it is a known defect in WinAppDriver and I just need to find some workaround for my particular place in the code?

Thanks in advance!