QT not responding after search sometimes !

hi when i search i now use the stop search function,
but still sometimes i get at the top of screen
qt not responding its freezes for a 20 sec or so then it works again is this normal?then when i restart soulseek QT client is freezes again then i restart it once again then its ok !

That's not entirely unusual if your computer isn't very fast and/or you're getting a very large number of search results.