autoSubscriptNumerals = true makes it impossible to type fractions or parentheses inside a subscript

[TomasRiker]

When autoSubscriptNumerals is set to true, then it becomes impossible to type fractions or parentheses inside a subscript (like in the base of a logarithm) because then the / and ( break out of the subscript. This side-effect, if it is intended, is not mentioned in the documentation.