Version: 1.52.0-insider (user setup)
Commit: a36c68b
Date: 2020-11-19T05:37:52.577Z
Electron: 9.3.3
Chrome: 83.0.4103.122
Node.js: 12.14.1
V8: 8.3.110.13-electron.0
OS: Windows_NT x64 10.0.19042
WSL2
Remote-WSL: 0.51.3

Steps to Reproduce:

1. Enable "editor.renameOnType": true in settings.
2. Create a Typescript file with the contents below:

function foo(object: Record<string, any>): void {
  const bar = '';
  if (bar === '') {
    bar.toLowerCase();
  }
  
}

3. Put the cursor on line 6 and type bar.
4. Wait momentarily for the renameOnType handler to select all occurrences of bar.
5. Backspace bar on line 6.

Expected:
Only bar on line 6 is deleted, as it is not an HTML tag.

Issue:
All instances of bar are deleted.

See:

Does this issue occur when all extensions are disabled?: Yes