OK, I'll have to look into it. When the Find panel is closed, it obviously should not be filtering the listed players. When I try this, it works as expected. For example, if I enter some text in the Find panel, the players are filtered accordingly. If I then press Ctrl+F to close the Find panel, the player list is automatically updated back to the unfiltered list.
The Find panel should always start out empty, any time a dialog that utilizes it opens. When you press Ctrl+F the first time to open the Find panel, does it have any text in it?
If you close the Add Players to Tournament dialog while the Find panel is open, the next time you open the Add Players to Tournament dialog the Find panel should still be open. What happens when you do this? Does the Find panel have any text in it? Does the player list populate or do you still have to press the Reset button or close the Find panel?