Phone Number Data Layer not E.164

Hi,

I have a problem with Google Enhanced Conversion Tracking. Google requires E.164 Phone number format. My Checkout is set this way so it brings E.164 Format to Orders but unfortunately the Data Layer which are pushed to Google Tag Manager by your plugin seem to be cutting the Phone Number, so instead of [+] [country code] [subscriber number including area code] (ex. +447821454897) I am getting only [country code] [subscriber number including area code] (ex. 447821454897). Obviously Google doesn’t like it.

Please could you help to resolve this problem.