Output from selecting optional property from auto complete modal incorrectly includes `?` in JS object

[omonk]

type T = {
  name?: string;
  age: number;
};

const obj: T = {};

When adding a value to obj, when typing the name key, the auto complete opens and includes name?, selecting this option will output name? in the object property identifier.

const obj: T = {
  name?: "foo"
};

This does not happen when using ^ space / editor.action.triggerSuggest and selecting the name option from the list.

[gabritto]

Note to self:
From LSP:

When an edit is provided the value of insertText is ignored.

I think this means that sending a default editRange + setting a completion item's insertText doesn't work: the insertText is ignored, and label is used instead.

The problem doesn't happen when using ctrl + space if you haven't yet started typing e.g. n, because then there is no editRange.