@Mattflaschen can pls take a look at this puzzling issue? Could it be more serious than just one isolated case?

The previous description.

1. Go to http://en.wikipedia.beta.wmflabs.org/wiki/User_talk:ET1 and click 'Browse topics'
2. Scroll to the last topic at the bottom: "Sep04-01" ( the topic is five months old) and click on it - "No topics returned from API" and " Rendered topic not found when attempting to scroll!" will be displayed.
3. However, the topic "Sep04-01" when you get to it, it's displayed without any problems.
4. Clicking on the Permalink option, directs to http://en.wikipedia.beta.wmflabs.org/wiki/Topic:Sob5yqhrkdzv7zaj which states that it's "Topic on User talk:ET1/Flow Archive 1"

Updating the topic in any way will produce Notifications referring to User talk:ET1/Flow Archive 1 which is confusing since the topic is, in fact, on a different page and perfectly available for active editing.

[FLOW] No topics returned from API Arguments { 0: Object, 1: Object, 2: false, 3: null, 4: "", 5: "", 6: "flow_topiclist_loop.partial", 2 more… }
FlowComponent.prototype.debug()
_flowBoardComponentLoadMoreFeatureRenderTopics()
flowBoardComponentLoadMoreFeatureJumpTo/<()
jQuery.Callbacks/fire()
jQuery.Callbacks/self.fireWith()
.Deferred/</deferred[tuple[0]]()
mw.Api.prototype.ajax/xhr<()
jQuery.Callbacks/fire()
jQuery.Callbacks/self.fireWith()
done()
.send/callback()

[FLOW] Rendered topic not found when attempting to scroll!
FlowComponent.prototype.debug()
flowBoardComponentLoadMoreFeatureJumpTo/_scrollWithoutInfinite()
flowBoardComponentLoadMoreFeatureJumpTo/<()
jQuery.Callbacks/fire()
jQuery.Callbacks/self.fireWith()
.Deferred/</deferred[tuple[0]]()
mw.Api.prototype.ajax/xhr<()
jQuery.Callbacks/fire()
jQuery.Callbacks/self.fireWith()
done()
.send/callback()