Reactions
Reactions are now part of discussion
What changed on June 3: post reactions became shared state across the backend, Feed, and discussions.
Why it matters
On June 3, reactions were connected across the backend, Feed, and discussions. A selected response and aggregate data became part of post state instead of a local button alone.
Dedicated tests cover rapid taps, stale responses, returning to the last confirmed state, and compatibility with older likes.
For a person, that means a predictable outcome after a delayed response: the interface either confirms the selected reaction or restores the last known state. This entry includes no speed measurement or full-device QA evidence.