Optional placeholder doesn't work with static characters

[happyCoda]

When using optional placeholder – ? in masks it can only work with placeholders – #, N, etc. and not with static characters.

V-Mask and Vue versions

2.2.3, 2.6.11

Reproduction Link

codesandbox

Steps to reproduce

1. For example let's use a phone number in format – (###) ###-####
2. Make dash optional (###) ###?-####

What is Expected?

Phones like 9999999999 will be formatted as (999) 9999999 and phones like 999999-9999 became - (999) 999-9999

What is actually happening?

Any phone became – (999) 999 so everything goes after the question mark (in pattern) just cuts off.

[arthurshlain]

Same issue, but i'm trying to make optional + sign in phone number. Nothing happens on type with value ?+# ### ###-##-##

I also trying to make function that check first + character, but array implementation looks as something wrong. (Why it's not possible to return string of placeholders from function?)

Maybe more specific plugin is needed to support phone numbers masking.