No paste available when files and folders copied

1. Open source folder in Explorer
2. Mark files and folders, right-click and click Copy.
3. Open the target folder, right-click, but Paste is inactive.
Tested variations presenting the same behavior:

• use the copy or paste function from the edit menu instead of right-clicking
• source and target folders in different Explorer windows.
  Tested on Release 0.4.3 and Build 73532.
  Expected behavior: Pasting possible and files and folders copied.