Data from "Steam Chat Images" won't show

[ShikikanQt]

Hey I have tried deleting my Cloud Data from the App "Steam Chat Images" which has the AppID 744350. It just gives me "0/2147483647 bytes used", no error nothing. It does show as "Owned" in SteamDB, so it should work? I also tried "Steam Chat Images Contents" .

Is it not possible to delete uploaded images in steam chat? It's already been two weeks and there are still images from july in there.

[ShikikanQt]

Other apps won't work either. It all just gives me a blank "0/xxxx bytes used".

[GMMan]

Those items may be UGCs rather than Steam Cloud files. They do not show up as Steam Cloud files. For other games, if they use auto-cloud, those files also do not show under Steam Cloud files but will take up storage space.