Pycharm Fragment Editor for Language Injection doesn't work properly

I have managed to get a proper support for SQL Language Injection in Pycharm through Database Navigator.

Sadly, the Fragment Editor (received when you press ALT+Enter and klick "Edit [injected Language] fragment) doesn't work properly in my case. I can only receive the fragment editor, when the fragment is empty. If there's already code inside, klicking ond "Edit[]Fragment" doesn't do anything.

The problem only seems to occur with SQL, I tested with HTML, and it worked perfeclty fine.

Does anyone receive different results? Do I have some settings in Pycharm wrong, or is it a bug?