Game not saving/deleting save files/ lots disappearing

Hello, I wanted to report a bug on my console which is an Xbox. I started noticing this on the 6th of August, I thought it was because of the update but I do get updates later in the day so I honestly do not know what could be the cause. Onto the problem.

It started with the game not saving at all and then when I would launch the game after, the last save file I was in and couldn't save, completely disappeared. Then it stopped for a while and I could save again so I created copies of the old save files and wanted to save the lots so I could transfer them to a new save but it was impossible and I got the error message. Overall, I thought my savefiles got corrupted and so I created a new one and started working on it. 

For two days, it was working and I was glad. But then two days ago, it started again and this time on the new ones. Could not save at all and disappearing when launching afterwards. After a while, I gave up and just wanted to try lots and the lots would appear fine when I was on it but when I go back to Manage worlds, they do not appear and I got an image of a llama in the middle of my screen (I'll try to put a picture). 

So here is my issue. I can still go the gallery and the main menu is fine but it's impossible for me to play so I thought I would report it and see if there could be a solution.

Thank you for reading