alert rule filter "is set" is treating ANY event with a message key as "set" and "does not contain" without a value ignores EVERY event

[kerenkhatiwada]

Environment

SaaS (https://sentry.io/)

Version

No response

Steps to Reproduce

filter "is set" is treating ANY event with a message key as "set"

1. create an alert rule with a filter like "The event's message value is set "
   
2. trigger an event with the message as an empty string
3. observe the alert is triggered

does not contain without a value ignores EVERY event

1. create an alert rule with a filter like "The event's message value does not contain " where the value is left empty
   
2. trigger any alert with a message
3. observe the alert is never triggered

Expected Result

filter is set is treating ANY event with a message key as "set"

• alert is not triggered for events with a message key that is an empty strings

does not contain without a value ignores EVERY event

• alert is triggered for any event with a message. including a non-operable issue alert may be useful.

Actual Result

filter "is set" is treating ANY event with a message key as "set"

• alert is for any event

does not contain without a value ignores EVERY event

• alert is triggered ONLY for events with a message key that is an empty strings

[getsentry-release]

Routing to @getsentry/workflow for triage. ⏲️