[Designer] designer crashes when binding to valid json

[IntranetFactory]

Problem Description

I use the following valid sample data

{ 
    "a": "a",
    "2": "b",
    "3-4": "cd"
}

when I try to bind to a TextBox to "2" the designer crashes

Screenshot

after clicking on "2" the designer area disapears

[anna-dingler]

@jwoo-msft Do we have a contact on from adaptive-expressions?