"iPhone storage full" notification even it is not full
At some point I have had my storage full. 2 months ago I deleted all the stuff, now I have 20 GB of free storage on my iPhone X.
But since then I keep getting "iPhone storage full" notification whenever I try to do anything. Sending a whatsapp message, opening the photo gallery, taking a picture..
Is this a bug, is there a way to stop this?
I am on iOS 15.2