Can't use inline style without selecting the text first

Follow these steps to reproduce:

• edit the same wiki page in realtime using two browser tabs/windows (can be with the same user)
• in the first editor, use Ctrl+B to switch to bold style BUT don't type anything yet (you can use other inline styles also)
• in the second editor type something, can be on a different line
• switch back to the first editor and wait for the change made in the second editor to arrive, then type something

Expected: the text typed in the last steps is bold
Actual: the typed text is not bold, i.e. the inline style was lost when the remote changed was received