Update for #11962

Author: andreubotella

css-overflow-4/Overview.bs

@@ -1199,21 +1199,29 @@ Fragmentation of Overflow: the 'continue' property</h3>
 	or if that is not the case for any possible clamp points,
 	to the first possible clamp point in the block formatting context.
 
-	Any boxes in a [=line-clamp container=] that follow its [=clamp point=] in the box tree,
-	as well as any [=line boxes=] that follow it inside an [=inline formatting context=],
-	will be invisible (behaving like ''visibility: hidden'').
-	This includes [=independent formatting contexts=]
-	as well as [=out-of-flow=] boxes,
-	and all of their descendants.
-	Any overflow such boxes and line boxes might have
+	Within a [=line-clamp container=],
+	the following boxes and line boxes will be invisible
+	(behaving like ''visibility: hidden''):
+
+	- Any [=in-flow=] or floating boxes
+		that follow the [=clamp point=] in the box tree.
+		This includes [=independent formatting contexts=]
+		and all of their descendants.
+	- Any [=line boxes=] that follow the [=clamp point=]
+		inside an [=inline formatting context=].
+	- Any [=absolutely positioned box=]
+		which has an invisible box within its [=containing block chain=],
+		and all of its descendants.
+
+	Any overflow such invisible boxes and line boxes might have
 	is always counted as [=ink overflow=] rather than [=scrollable overflow=].
 
 	NOTE: This differs from the ''display: none''-like behavior
 	of not rendered content with ''continue: discard''.
 
 	If a [=block container=] contains a [=clamp point=],
 	within itself or in any of its descendants,
-	its [=automatic block size=] will not take into account any of its children after the clamp point.
+	its [=automatic block size=] will not take into account any invisible boxes.
 	This also applies for the [=line-clamp container=] itself.
 
 	NOTE: If there are any floats before the [=clamp point=],