This searches for *.ts files and excludes .ts files in the second workspace folder.

vscode.workspace.findFiles('**/*.ts', new vscode.RelativePattern(vscode.workspace.workspaceFolders[1], '**/*.ts')).then(result => {
        console.log(result);
});

When I run this, I get 0 results, when it should return results from the first workspace folder.

Seems like it's always been that way. Is that intentional @bpasero? If not I can fix it. We can pass absolute exclude globs to search.

https://github.com/Microsoft/vscode/blob/b7e6e04666ca8dde560b69081c43365dce77d12a/src/vs/workbench/api/node/extHostWorkspace.ts#L357