Field Mode Read Only doesn't show an input field

[M4rk3tt0]

Hi, as far as I understood from the guide we have 3 fields mode:

1. null: Default option. Show an input with the computed value but still allow manual editing.
2. Display Only: Show the computed value but will not save it to the database. Usually used for alias fields.
3. Read Only: Show an input with the computed value and disallow manual editing.

However I tried all the modes and the only one that shows an input field is the null mode, whilte the Display Only and Read Only show a label. I thought that the Read Only field was going to show a disabled input field.

Am I missing something?