Conflict Dialog Appears Nearly Always When Saving in Realtime Mode

Xwiki 11.10.3, RtWysiwyg 1.37:

When working in Collaborative Editing mode (just with two users for testing purposes), using the "Save" button nearly always leads to "conflict" warning dialogs.

I'm not sure if that's how it is supposed to be and which option to chose best then in order to avoid data loss?

I also quickly ran into following error messages, already during my very first tests with Rt Wysiwyg in Xwiki 11.10.3:

For now, I just completely removed the extension again, as we could not really work reliably with Xwiki while it was enabled.