Document created by "Export reads" feature opens with an error

Scenario to reproduce:

1. Open any assembly.
2. Call a context menu on any read, select {Export -> Current Read}

   menu item.

3. Set any appropriate destination and apply the dialog.
   Expected state: a new document is added to the project, a view opens (MSA Editor or Sequence view, it should be clarified, see the documentation).
   Current state: a new unloaded document is added to the project. If you force it to open it will load but "open view" task will fail with an error: "Multiple alignment object not found".

Also you can export visible reads. An assertion fails in debug mode, fix it.