Back pagination is not working for found event

[Mefi100feLL]

Hello.
I load the context for the event, found through a search to find a branch that corresponds to this event.
After loading the label, I try to load events before and after found.
Events after the found loaded successfully.
And the events before found to loading indefinitely until triggered timeout.

[richvdh]

Possible this is related to #2504. I can't reproduce it now, so either way, I don't think there's anything else we can do.