Two references usage causes error

[webmake]

Currently I have:

profileNumber: '@contact1->phoneNumberPrefix@contact1->phoneNumber'

but due ReferenceEscaperLexer it makes '@contact1->phoneNumberPrefix\@contact1->phoneNumber' and can't resolve phoneNumberPrefix because trying to access phoneNumberPrefix\ I tried with comma, but also getting error:

Can't get a way to read the property "phoneNumberPrefix," in class "App\Entity\Contact".

What am I missing? Or is it bug?