gRPC body params strange behavior

For example, I need to generate a UUID for my gRPC request body.

I start typing ${[uuid and a helper popup appears, letting me choose one of theuuid.* parameters. If I do it this way, the body ends up like

{
"uuid_field": "${[uuid"
}

- no closing brackets appear, and no UUID is generated. Adding the closing brackets manually doesn’t help.

The only way to make it work is to write the whole expression by hand, and when it converts into an interactive “button,” click it and press “Save.”

Only after that does it start generating UUID values.