Random portal zap vibrations in 'default' vibration mode on Android only
For a long time the 'default' vibration mode on both Android and iOS has prevented portal zaps from vibrating. And this is great because those vibrations are too much and very annoying.
In the latest updates of the client a random amount of vibrations happen during portal zaps on Android only. Not all portal zaps lead to vibrations, but a non-zero amount do.
The iOS client still doesn't vibrate at all during portal zaps. This is ideal.
1) adjusting the setting to All and back to Default,
2) reinstalling the client,
3) uninstalling, rebooting the phone and reinstalling the client.
Nothing so far stops a random amount of portal zaps causing vibrations on the Android device.