domain: fix unstable test (#36308)
domain: fix unstable test (#36308)

close pingcap/tidb#36310
ngaut/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb