Thanks for your feedback and sorry for the disruption this caused for some of you, especially where it affected existing history 
A bit of context on the change:
- Better onboarding: new users don’t necessarily want to track multiple watch. If they want, they can change it in trakt.tv/settings.
- Accidental re-watch spam: it’s common for new users to unintentionally add multiple plays, which can quickly spam watch history and our database.
- Technical detail: the setting was enabled by default when no explicit value existed in the database. That meant it unintentionally applied more broadly than intended.
What’s changing now:
- New users (accounts created within the last 6 months) will have Disable Multiple Plays enabled by default to provide a safer onboarding experience.
- Existing users are no longer affected by this default, based on join date.
What’s next:
- The destructive behavior (overwriting previous history on rewatch) will be adjusted in the near future, so this setting is less risky and more predictable in any case.
We agree this should have been communicated more clearly, and that’s on us.
Thanks for the passionate feedback 