when placing multiple blocks (in the form of [block\:] in other statblocks the formating ends. the background of the text ends while the text keeps going, and then the text ignores more and more margins. my guess is that something happens when a block is called where one more </div> is added then <div> is added, so it accidentally closes other divs creating this "breaking out" effect.
add a significant number of [block\:] to a statblock. for me it becomes very apparent at 10.