Uptime Monitor Status alert filters are not working in 7.9.2

[mahajanankur]

Kibana version: 7.9.2

Elasticsearch version: 7.9.2

Server OS version: Ubuntu 18.04 LTS

Browser version: Chrome Version 85.0.4183.121

Browser OS version: Ubuntu 18.04 LTS

Original install method: Docker

Describe the bug: I recently upgraded the ELK version to 7.9.2 from 7.9.0 and the filters (port or locations) in Uptime Monitor Status are not working. It doesn't affect the triggering of alerts whether I mention a filter or not.

Steps to reproduce:

1. Login Kibana.
2. Add an index type alert connector.
3. Configure Uptime Monitor Status alert. Configure the heartbeat before this step.
4. Filter on a port or location and check the index.

Expected behaviour:
The filter should work properly as it works in version 7.9.0.

Screenshots (if relevant):

Errors in browser console (if relevant): Checked but found no error.

Provide logs and/or server output (if relevant):

[elasticmachine]

Pinging @elastic/uptime (Team:uptime)

[shahzad31]

Fixed by #79756