2.0.0-rc Repeating a signal write after remounting its async reader publishes it early #3374

Describe the bug

Remounting an async reader and then repeating the pending signal write makes the signal publish before its derived value. The repro briefly shows Count: 1 alongside Details: 0.

Your Example Website or App

https://s.olid.uk/id/U6TNbM1ORvOIBIs3c4H9hQ

Steps to Reproduce the Bug or Issue

1. Wait for both values to show 0.
2. Click Run.
3. Count changes to 1 while Details stays 0 for another second.

Expected behavior

Count and Details should update together.

Screenshots or Videos

No response

Platform

• OS: Windows
• Browser: Firefox

Additional context

Reproduces on next at f8b40b7 (development and production) and #3337 at 20f3143.

Removing either setVersion(2) or the second setCount(1) makes the values update together.