Neat Video clips disappear

Something weird going on with Neat Video & FCPX, when I'm applying to a clip then selecting an area to sample (like I always do) then select 'apply' after the plugin thinks about it the clip then goes black? Never had this before. If I then toggle the plugin Off the clip is visible again. Anyone had this?

On a side note any problems with V4 of Neat Video and FCPX?

All sorted and update to NV did the trick

Glad you had a simple solution so fast! And thanks for sharing. So many folks on forums find a solution and just post, "Never mind, fixed it!" Then others are unable to learn from their experience. So, thanks for sharing your solution, much appreciated.