I have been getting that for the past 24 hours on my L635 with build 10166 which I did not have since the upgrade! Also, this morning, out of the blue the apps that I transferred from phone to the SD card are not available since OS cannot read the SD card!!!
It seems that the phone behaves differently if you set the apps in the Storage Sense to store directly on the SD card rather than if you transfer apps from the phone to the SD card! The latter still leaves traces of the apps on the phone storage which is linked to the same apps on the SD card...