WhatsApp for Motorola Moto G84 5G

This is almost always caused by Motorola's battery optimization killing WhatsApp in the background. Go to Settings > Apps > WhatsApp > App battery usage and set it to Unrestricted. Then open Settings > Battery and turn off any battery saver profile, and disable Adaptive Battery (Settings > Battery > Adaptive Battery) so the system stops throttling WhatsApp. After this, messages and calls should sync in real time instead of arriving in a batch when you reopen the app. See how others solved this on Reddit

Motorola's power management is putting WhatsApp to sleep, so queued notifications only flush when you reopen it. Set WhatsApp to Unrestricted under Settings > Apps > WhatsApp > App battery usage, and turn off Adaptive Battery in Settings > Battery. Then confirm notifications are fully enabled in Settings > Apps > WhatsApp > Notifications and that WhatsApp is allowed to send notifications at all. Keeping WhatsApp excluded from background restrictions is what stops the delay. See how others solved this on Reddit

The most reliable fix reported by owners is to remove every background restriction Motorola puts on the app. Set WhatsApp battery usage to Unrestricted (Settings > Apps > WhatsApp > App battery usage), disable Adaptive Battery in Settings > Battery, and make sure WhatsApp is not listed under any battery-saving or 'optimized' app list. Some users also found that reinstalling WhatsApp and reconfiguring it without battery optimization permanently resolved the lag after a reboot. See how others solved this on Reddit

With the screen off the phone enters Doze and suspends background apps. Exempt WhatsApp by setting it to Unrestricted in Settings > Apps > WhatsApp > App battery usage, and turn off Adaptive Battery in Settings > Battery. Also check that WhatsApp has not been auto-disabled under Settings > Apps > Unused apps / 'Pause app activity if unused', which can stop it from waking the screen for calls. See how others solved this on Reddit

Several Moto G84 owners report video calls dropping or freezing across multiple apps, which points to a software/firmware issue rather than your network. First make sure WhatsApp and your system software are fully updated (Settings > System > System updates), clear WhatsApp's cache under Settings > Apps > WhatsApp > Storage and cache, and confirm Camera and Microphone permissions are granted in Settings > Apps > WhatsApp > Permissions. If it still happens across every app, report it to Motorola support, as a system update is needed to patch it. See how others solved this on Reddit

The Android 14 update can reset notification visibility settings. Go to Settings > Notifications > Notifications on lock screen and choose 'Show all notification content', then open Settings > Apps > WhatsApp > Notifications and re-enable the message categories. Toggling WhatsApp notifications fully off and back on after the update usually re-registers them so they appear on the lock screen again. See how others solved this on Reddit