We arrived to water damage on the ceiling in the kitchen. All drains upstairs were blocked. We cut Sheetrock to check for leaks from drains or failed wax ring. We ran all water upstairs to and found no leaks. While running fixtures upstairs the soft blockage in the line cleared itself under the weight of the water. We have a drain/camera tech scheduled for Tuesday to check for possible causes of the backup as this has happened multiple times in the past.