Fix terminal data buffering from pty host

Fixes microsoft#186782

Author: Tyriar

src/vs/platform/terminal/node/ptyService.ts

@@ -270,7 +270,6 @@ export class PtyService extends Disposable implements IPtyService {
 		}
 		const id = ++this._lastPtyId;
 		const process = new TerminalProcess(shellLaunchConfig, cwd, cols, rows, env, executableEnv, options, this._logService, this._productService);
-		process.onProcessData(event => this._onProcessData.fire({ id, event }));
 		const processLaunchOptions: IPersistentTerminalProcessLaunchConfig = {
 			env,
 			executableEnv,
@@ -282,6 +281,7 @@ export class PtyService extends Disposable implements IPtyService {
 			this._ptys.delete(id);
 			this._onProcessExit.fire({ id, event });
 		});
+		persistentProcess.onProcessData(event => this._onProcessData.fire({ id, event }));
 		persistentProcess.onProcessReplay(event => this._onProcessReplay.fire({ id, event }));
 		persistentProcess.onProcessReady(event => this._onProcessReady.fire({ id, event }));
 		persistentProcess.onProcessOrphanQuestion(() => this._onProcessOrphanQuestion.fire({ id }));