请先帮忙看下我截图中poco的用法对吗，为什么这样用在第二次进行登录的时候输入不了密码

```py
# -*- encoding=utf8 -*-
__author__ = "lenovo"

import random
from airtest.core.api import *
from poco.drivers.android.uiautomation import AndroidUiautomationPoco
poco = AndroidUiautomationPoco(use_airtest_input=True, screenshot_each_action=True)

login=poco("com.test.parentsmeeting.debug:id/tv_splash_login")
pwd=poco("com.test.parentsmeeting.debug:id/et_login_type_pwd_number")
login_confirm=poco("com.test.parentsmeeting.debug:id/btn_login_verify_enter")
def start_app():
# connect_device(
# "Android://127.0.0.1:5037/HC47EWY05363?cap_method=javacap&touch_method=adb")

#dev.start_recording();
wake() # 唤醒手机屏幕
# start_app('com.test.parentsmeeting.debug','com.test.parentsmeeting.module.home.SplashActivity')
# 进入LaunchActivity 这样每次启动app就是进入到登录页面了方便流程控制
shell(
"am start -n com.test.parentsmeeting.debug/com.test.parentsmeeting.module.home.SplashActivity")
login.click()
sleep(3)
pwd.set_text("")
pwd.set_text("15088888888") #第二次循环运行到这里的时候输入不了密码
login_confirm.click()
sleep(10)
auto_setup(__file__)
connect_device("Android://127.0.0.1:5037/4496f28c?cap_method=javacap&touch_method=adb")
for i in range(2):
start_app()
```