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:

Reproduce the TypeScript snippet in VS Code and inspect the repository's TextMate grammar files to locate handling for multiline union types. Done means the following function is highlighted correctly without requiring a semicolon or an extra blank line.