When I create/edit pages with new editor a blank line gets translated to this: <br> <span class="line-spacer d-block"> </span> But previously it saved as just <span class="line-spacer d-block"> </span> The end result is any page edited with new editor is excessively long (but ultimately a different format). I don't want to remove the blank line entirely, because I need to the space for visibility when editing and I don't want to revisit every screen, but I now need to go back to old edit for every page. And saving on the WHOLE page applies the change to the whole page.
Edit any page. Put a blank line in between two quote blocks (for example).
Possibly related to line-break and list parsing issues.