Incorrect Arcade Mode Playtime Tracking

I’m writing to report a persistent issue with playtime tracking in Arcade modes. My Career Profile > Summary shows only 19 hours of Arcade playtime, despite:
Actively playing Arcade modes (Total Mayhem, Mystery Heroes, etc.) for over a year
Having reach level 1692, which clearly demonstrates hundreds of hours of gameplay
Normal playtime tracking working perfectly in Quick Play and Competitive modes
Technical Details:

  1. XP and level progression work correctly
  2. The issue affects only playtime statistics
  3. Restarting game/client doesn’t resolve the issue
  4. All Arcade modes show the same tracking problem

Blizzard doesn’t care about Total Mayhem.