Logged this one 22 days ago and the last activity on it was 15 days ago so the topic is closed (a bit weird without resolution).
I tried searching with today’s version 7.0.8.b1 and it also failed.
However I dId notice something else that may be of use to you in tracking this problem. The search WILL WORK if the group to which the selected item belongs is EXPANDED. I
tried to reproduce the issue here, but unfortunately a selected listing from search result gets selected. Are you sure the listing is in the outline view? As you have a corrupted database, it is possible that you have some sort of ghost-listings, that appear in the search result but not in the listing hierarchy.