Num of events in an issue condition using large time period is flaky

### Environment

SaaS (https://sentry.io/)

### Steps to Reproduce

1. 2 alerts (see [customer case](https://www.notion.so/sentry/17e8b10e4b5d80b8805ffd2d618ac6c1)) are identical except 1 uses `event's {attribute="environment"} value {match="equals"} {value="beta"}` filter, and the other one has the same environment selected at the top instead.
2. An issue (see [customer case](https://www.notion.so/sentry/17e8b10e4b5d80b8805ffd2d618ac6c1)) where ALL events match all other conditions in both alerts and are 100% from the same matching environment.


### Expected Result

both alerts fire

### Actual Result

only the alert with top-level environment filter fires

### Product Area

Alerts

### Link

_No response_

### DSN

_No response_

### Version

_No response_