Issue: Members posts/topics not found

When posting new material in download section I usually help myself with the function "my posts/my thread" that is in top right corner (second row) or either through my profile with "Find latest posts/Find latest started threads" function. It's easier to keep track of what I've already share and what not.

But this function is currently useless. I'm not sure since when but at least today I cannot use this function. When searching for topics it gives me "no results" error, and the earliest result I get on my posts is back from 2007 with 33 posts only (just to note, many of the 33 post are the starting post of new topics as well, but those are not displayed at all when I search for topics).

I tried using this function for searching other members posts/topics and it appears the same problem is present there as well.
I don't know if it is but this may be connected with search problem as well.