This feature will be implemented in emulsion 2.3.6
Theme Scheme : Full Site Editing Theme
The block following the block in which alignleft and alignright are set may be displayed in a different position from the heading block and paragraph block.
In this case, try wrapping the misaligned blocks with a group block and setting the Stack to vertical.
note: This issue is a priority issue and is different from the general theme setting. Please note that left-right alignment etc. does not work.