All Board Activity Notifications Re-enable After Permission Changes

Trello users seeking to maintain focused alert coverage often rely on the 'All board activity' notification tier to capture cross‑card changes. However, this setting is observed to re‑enable automatically following board permission modifications, such as role updates or member additions, forcing manual re‑disabling for each affected user. The feature resides in Account → Notifications and is intended to surface board‑wide events, but its interaction with the per‑user preference model creates a consistency gap when board‑level access control changes occur. Additionally, Power‑Up components like Card Aging may inject supplementary alerts that are not governed by the core notification toggles, further complicating noise reduction efforts.

How does the 'All board activity' setting interact with granular permission changes to preserve or reset its state? Can board administrators configure a default that persists across membership modifications? Are there undocumented configuration paths to lock the selected notification tier without per‑user re‑application?