Steps to reproduce
1. Create a confluence page as user A
2. Watch the created page as user B
3. Add a reaction as user C

Expected behaviour
Users A and B get notified about the reaction

Actual behaviour
Only user A gets notified about the reaction (Someone reacted to your page)

Justification
Watching a page should also include any action on a page. E.g. adding comments also lead to notifications to watchers.