wiki:process_optimal-bridging-angles
If you are having issues with bridges running the length of the whistle instead of the shorter width, you can try changing bridge infill direction to 90 degrees and seeing if bridges go the short way in the slicer preview.
This screenshot is from OrcaSlicer, but Bambu Studio should be similar. If they're still going the long way, try 180.
The bridging layer should look something like this in the slicer preview:
wiki/process_optimal-bridging-angles.txt · Last modified: by speedwhistles