Help - Any Potential Issues In My Loading Logic?

My game’s loading system working mostly fine, but there’s like 1/500 of chance that it will stuck at the loading screen widget. The music of level is still playing, so it feels like it has something to do with the load level node itself.
But I really have no clue whether there’s some potential issue that I haven’t noticed or due to my lacking of knowledge on this matter.
Below is my loading level logic, something could go wrong??

Ok here’s the full-size image, the site shrinked my image after uploading