WhatsApp for OnePlus 10R

OxygenOS's aggressive background management and any built-in or third-party storage cleaner can wipe WhatsApp media in the background. First, set WhatsApp to unrestricted background use: Settings > Apps > App management > WhatsApp > Battery usage > and choose Don't optimize (or Unrestricted). Then open WhatsApp > Settings > Chats and turn on Media visibility so media stays saved to your gallery. Finally, confirm WhatsApp has full Files and media permission under Settings > Apps > App management > WhatsApp > Permissions, and uninstall or disable any cleaner apps that may be purging the WhatsApp folder. See how others solved this on Reddit

Lag during WhatsApp video calls is usually the system throttling the app plus background processes using RAM. Set WhatsApp to unrestricted battery use via Settings > Apps > App management > WhatsApp > Battery usage > Don't optimize (or Unrestricted), close other background apps, and update WhatsApp from the Play Store. If it stutters mainly on cellular, a weak 5G signal can cause it, so try switching the preferred network type under Settings > Mobile network to test 4G/LTE versus 5G. See how others solved this on Reddit

Delayed or missing WhatsApp notifications are almost always OxygenOS killing the app in the background. Set WhatsApp to unrestricted battery use under Settings > Apps > App management > WhatsApp > Battery usage > Don't optimize, then lock WhatsApp in the recent-apps tray (open recents, tap the app's icon or menu, choose Lock) so it isn't cleared from memory. Also confirm notifications are enabled under Settings > Apps > App management > WhatsApp > Notifications, and that Do Not Disturb isn't silencing them. See how others solved this on Reddit

WhatsApp calls use VoIP over data while normal calls use the cellular line, and the two are handled separately, so an incoming WhatsApp call can ring (or interrupt) during a regular phone call. There's no full fix from WhatsApp's side, but during important calls you can enable Do Not Disturb under Settings > Sound & vibration > Do Not Disturb to suppress the extra ring, or simply decline the incoming WhatsApp call. Keeping both WhatsApp and OxygenOS updated helps reduce audio glitches when the two overlap. See how others solved this on Reddit

"WhatsApp keeps stopping" usually comes from a corrupted cache or an outdated build after an OxygenOS update. Go to Settings > Apps > App management > WhatsApp > Storage usage > Clear cache (not Clear data, which would wipe local chats), then update WhatsApp from the Play Store and restart the phone. If it still crashes, back up your chats via WhatsApp > Settings > Chats > Chat backup, then reinstall WhatsApp. See how others solved this on Reddit

When you open another app mid-call, OxygenOS can suspend WhatsApp in the background, muting your audio. Set WhatsApp to unrestricted background activity under Settings > Apps > App management > WhatsApp > Battery usage > Don't optimize, and lock the app in the recent-apps view so the system won't pause it. Also confirm the Microphone permission is allowed under Settings > Apps > App management > WhatsApp > Permissions. See how others solved this on Reddit