Steps to reproduce:

  1. Click on Editor1 to start editing it
  2. Turn on SCAYT on Editor1
  3. Right click on the text 'Editor1'
  4. Left click anywhere else in the editor to close the context menu. It's important to not actually click on the context menu.
  5. Repeat step 3
  6. Repeat step 4
  7. Click on Editor2