Bug Report

What did you do?

https://tcms.pingcap.net/dashboard/executions/plan/1680848
https://tcms.pingcap.net/dashboard/executions/plan/1680811
deploy with 3 pds
1、run tpcc
2、run ha-pdleader-to-all-network-partition-last-for-10m

What did you expect to see?

qps can recover in 2min when inject pd leader network partition

What did you see instead?

qps dorp to zero after pdleader network partition

What version of PD are you using (pd-server -V)?

./pd-server -V
Release Version: v6.7.0-alpha
Edition: Community
Git Commit Hash: b2f2a82
Git Branch: heads/refs/tags/v6.7.0-alpha
UTC Build Time: 2023-02-24 11:32:41