LogOutputChannel does not clear all characters of Log Message

[AnWeber]

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

Version: 1.91.1 (system setup)
Commit: f1e16e1
Date: 2024-07-09T22:06:49.809Z
Electron: 29.4.0
ElectronBuildId: 9728852
Chromium: 122.0.6261.156
Node.js: 20.9.0
V8: 12.2.281.27-electron.0
OS: Windows_NT x64 10.0.22631

Steps to Reproduce:

1. Create extensions with code

export function activate(): void {
  const notClearable = vscode.window.createOutputChannel(`LogOutputChannel`, { log: true });

  notClearable.info('my first log message');
  setTimeout(() => {
    notClearable.clear();
    setTimeout(() => {
      notClearable.info('my second log message');
    }, 4000);
  }, 4000);
}

3. start extension

After 8000ms LogOutputChannel should only have one message my second log message in the channel. Instead it contains some remaining chars of the first log message.

[c3danielxu]

I am running into the same issue as well. After calling clear on a LogOutputChannel, when the next message is logged, regardless of info/error/debug/etc, part of the previous log is shown.

[nhedger]

It is possibly a duplicate of my previous issue, #204946, which I believe was closed prematurely.