Sorry to start off with questions but just need to clear up a few things .
Are you saying that your notification bar is empty?
When it is collapsed are there icons across the top of your device like normal?
Is it all notifications that are missing or just some of them? If some and not all, is it always the same apps that are blank?
Are you using a third party launcher or the stock one that came on the phone?
Is this device rooted? Did you buy from retail or private seller? Is the device new, refurbished, or used?
How long ago did you first notice this happening?
I would start by clearing the partition cache since it sounds like a bug. Maybe something that happened after an update. Here are the directions for your device;
To clear the cache partition on a Huawei P20 Pro, you can use the device's recovery mode. This process removes temporary cache files without deleting personal data. [1, 2, 3]
Steps to clear the cache partition [2, 4]
- Turn off the phone
- Press and hold the Power and Volume Up buttons
- Release the buttons when the phone turns on and displays the logo
- Use the Volume buttons to highlight wipe cache partition
- Press the Power button
- Use the Volume and Power buttons to confirm your choice
- Use the Volume buttons to select reboot system now
- Press the Power button to confirm
You can also clear the cache for individual apps by following these steps: [5]
- Open Settings
- Select Apps & notifications
- Select the app you want to clear
- Select Storage
- Select Clear cache
Clearing the cache partition can help refresh the EMUI system and troubleshoot issues. [3, 6]
Since you can't reproduce this issue at will and restarting corrects it, there's probably no reason to restart the device in Safe Mode to see the results. You might have to wait hours or days for results. Let us know what you find and we'll go from there.
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