Firstly, thanks so much for a great/essential plugin. There is no way WordPress could be used as a proper CMS without it.
Secondly, we have discovered a bug with WYSIWYG fields in a repeater. Please follow steps below to replicate:
1. Find a repeater with a WYSIWYG field
2. Whilst editing, click the “expand fullscreen” button in the TinyMCE toolbar
3. Alter the content in fullscreen
4. “Un-expand” the window to return to the normal admin view
5. The new content we have just added will have overwritten the main post_content editor, not the repeater field as intended