I hate saying this, but the first thing to do after any update of the OS is to do a reset of the device to factory state. Usually helps to disable auto app restore when setting up Google account on the newly wiped device. This process optimizes the apps without restoring all the custom data that may be stored in your account for that app. You could always try to reinstall the offended app and see if it was just that app. I haven't noticed issues on my replacement device since updating and FDR.
