Lost game progress on Ps5 - multiple chapters of progress gone

Hi there,

I have been playing Immortals of Aveum on PS5. I recently had a play session where I started during the "Colossal" chapter and proceeded all the way through completing the "Occupation" chapter (12). I can see that I have the trophy for completing both "Occupation" and "ruin" . I only ever close the game after seeing the auto-save icon in the top complete whatever it does.

However, when I logged on this evening and booted up the game and hit "resume" from the main menu my game progress was back in the "Colossal" chapter where I needed to go meet Kirkan in the war chamber - effectively hours back. When I closed the game hoping a restart might fix the lost progress it apparently overwrite my PS5 cloud progress so that backup save is also now back at the "colossal" chapter. 

How can I fix this?

Thank you,

Kevin M