In a user-defined enumeration, the item is not selected with Blocks.

FieldUserEnum

Describe the bug
No items are selected a user-defined enumerations of Radio Broadcast extensions and playground example.

playground example

Creating enumerations with blocks
https://makecode.com/defining-blocks#creating-enumerations-with-blocks

Playground example : Create Enums from Blocks

Sample: Creating Enum
Editor: micro:bit

On Blocks editor
Place the blocks as follows:

Member Red (=0) is not selected, but the display will be 0

JavaScript editor → Blocks editor
On the JavaScript editor, code as follows:

When I convert to Blocks, it shows Red instead of Blue and nothing is selected.

However, since 1 is displayed on the simulator, it appears that Blue (=1) is selected internally.
It appears that internal values are retained when blocks are copied.

Additional context

value
The format of the name is 10mem, where "10" is the value and "mem" is the enumerated member.
Therefore, it is not hit by item selection and does not become selected.

https://github.com/microsoft/pxt/blob/master/pxtblocks/fields/field_userenum.ts#L152

menu generator
The fake line is called in the createMenuGenerator function.
https://github.com/microsoft/pxt/blob/master/pxtblocks/fields/field_userenum.ts#L62

Start in pxtblocks/fields/field_userenum.ts, especially the createMenuGenerator function and the value handling around line 152. Reproduce the Radio Broadcast extensions example and trace JavaScript-to-Blocks conversion for a user-defined enum. Done means the correct enum member is selected and displayed in Blocks while preserving its numeric value.