Union between object and template string literal includes incorrect intellisense suggestions

[Wundero]

Bug Report

When creating a union between a standard object type and a template string literal which includes generic values (e.g. `${number}/${number}`) causes the intellisense to suggest all functions in the String object, despite not actually being valid suggestions.

🔎 Search Terms

template string literal union object intellisense

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about intellisense
• I was unable to test this on prior versions because I cannot install them easily

⏯ Playground Link

Playground link with relevant code

💻 Code

type WorkingIntellisense = {
    key: string;
} | `string literal`;

const workingIntellisense: WorkingIntellisense = {
    key: 'value',
};

type BrokenIntellisense = {
    key: string;
} | `string literal ${string}`;

const brokenIntellisense: BrokenIntellisense = {
    key: 'value',
};

🙁 Actual behavior

The intellisense suggestion shows string functions.

🙂 Expected behavior

Intellisense should only show known properties.