The process query status result is empty

[junly917]

When the status of my monitoring alarm configuration is 0, the process is normal, but after running for a period of time, the process query suddenly becomes empty, resulting in the alarm not being triggered

How should this alarm be configured, and under what circumstances will the query status be empty?

version info:
process-exporter, version v0.7.10 (branch: HEAD, revision: 935906b)
build user: root@buildkitsandbox
build date: 2021-11-17T13:18:57+00:00
go version: go1.17.3
platform: linux/amd64