Problem Loading Textures on Android 7.x or lower

Hej everyone,
so I just discovered there is a problem with the game I am working on on Android 7.x or lower. On Start, the Game downloads Textures through the Adressable System, however, it seems to correctly load only very few Textures in. On Android 8.x and 9.x everything works as intended, but on the older versions, most of the Images appear blank. 5 out of 30 Images were loaded in correctly, but the rest stayed blank.
And I am not really sure what to do about it, as said, 8.x and higher Versions of Android work completely fine as intended, anything below 8.x doesn´t seem to work for some reason.

Thanks for the help in advance,
David