Bad syntax Highlighting in TS when using multiline union types

Does this issue occur when all extensions are disabled?: Yes/No

• VS Code Version: 1.95.3
• OS Version: MacOS 15.0.1

Steps to Reproduce:

Write the following in VSCode

let myObj:
    | {
          prop1: string
      }
    | {
          prop2: string
      }
function myFunc() {}

The syntax of function myFunc() {} and everything after it is broken.

I found that it happens only in this rare edge case. Some things that actually fix it:

1. Adding a semicolon

let myObj:
    | {
          prop1: string
      }
    | {
          prop2: string
      };
function myFunc() {}

2. Writing the union type on a single line

let myObj: { prop1: string } | { prop2: string }
function myFunc() {}

3. Adding a line break before the next line of code

let myObj:
    | {
          prop1: string
      }
    | {
          prop2: string
      }

function myFunc() {}

Bad highlighting:

Wanted highlighting:

VS Code で TypeScript のスニペットを再現し、リポジトリの TextMate 文法ファイルを調べて、複数行のユニオン型の処理箇所を特定します。セミコロンや余分な空行を必要とせず、次の関数が正しくハイライトされれば完了です。