Much more rarely they're caused by a mistake on Microsoft's part regarding the update itself.
Should you install the latest version of Android onto your Android smartphone? But before updating I recommend that you read this article first as it can save you a lot of time and can help prevent trouble and common issues that can occur during the upgrade process. Updates often add more features, greater functionality, and also help protect your cell phone against recent security threats that might compromise the data on your device.
So yes, upgrading to the newest official version of software for your Android phone is typically never a bad idea.
This is true at any time but it is especially important to backup a phone before an update as sometimes updates and upgrades can erase information from an Android device or even clear the data on the phone during the process.
So make sure that you create a backup before updating and to also create periodic backups of your cell phone should it ever malfunction, or get broken.
It's years I use Linux systems on a daily basis, and I never had major problems by updating a system when it was running, but I still wonder why this is possibile. Suppose a program "A" from a certain package is running on a system.