When you change a custom rule, the page gets stuck.

Created by: wenxin-01

Preset conditions 1、There is account A, which has cluster management privileges. 2、Use account A to log in to KS, and go to Platform management--》Cluster "B" management--》Alerting Policies. To Reproduce Steps to reproduce the behavior:

1. Click "create"
2. Click 'next' after input name
3. Click 'custom role'
4. select any Monitoring indicator
5. Modify monitoring rules
6. Reselect monitoring metrics

Expected behavior Choose success Actual behavior The page get stuck

/priority high /area alerting /cc @leoendless /kind bug /milestone 3.1.0