This issue has been around long enough and still has not been resolved as yet!
There is a problem with the magic gauge pieces in the default passive subscreens. Here's the problem:
Even when you give Link some magic to start with and give him the 1/2 magic upgrade from the start, the magic gauge pieces, as well as the 1/2 magic icon are still invisible! Here's why:
The tile for magic gauge pieces 1-8 and the 1/2 magic icon are set to tile 26205
And the tile for magic gauge pieces 9-16 are set to tile 26225
Here's the corrections that need to be made:
The tile for magic gauge pieces 1-8 and the 1/2 magic icon should be set to tile 26210, where the upper magic gauge piece tiles begin
And the tile for magic gauge pieces 9-16 should be set to tile 26230, where the lower magic gauge piece tiles begin
Default Subscreen Error: Magic Gauge Pieces!
Fixed.....