Using InDesign Style can cause the wrong bullet to be displayed.

Using InDesign 17.3 under macOS 12.5.1

When an InDesign style forces text to be in ALL CAPS, a custom bullet based on a lowercase letter is also changing to the capital letter equivalent. Changing the case of the text should never change the case of the bullet set in a style. 

To reproduce

1. Start a new InDesign document

2. Create a text box and enter "test"

3. Create a new paragraph style called "Bullet"

4. Go to the Bullets and Numbering section of the style and change the List Type to "Bullets"

5. Click "Add" 

6. Using a normal text font, add the symbol "a" (lowercase a) as a bullet. Click OK.

7. Select your new "a" bullet for the "Bullet Character"

8. Click OK. Note the correct appearance of the example.

9. Double click the "Bullet" style to edit. 

10. Open Basic Character Formats and change "Case" to "All Caps"

11. Click OK. 

12. Note that your text has correctly changed from "test" to "TEST". Note also, however, that your bullet has changed from "a" to "A". This should not happen, especially when the bullet is a symbol font, which causes the wrong symbol to be shown.