Our partner company has raised a similar issue in the past: rdar://124607822

Hello there, I am not sure if I am facing the same problem (given I have noticed it on customers using iOS 15 or iOS 16 as well), but 1 out of every 200 or 400 users has this storage issue, where the storage consumption explodes to unreasonable sizes. Our installation usually is about 200MB to 300MB, I had it linked to our analytics reporting to get this data from the field, but all of the sudden we have users with 4GB or 5GB for no good reason. Listing their directories, I can totalise everything they have under the app and documents to be a little over 500MB (this is including the bundle with its resources)... so where are the other 3.5GB of data iOS is reporting?