I am experiencing the same problem. My use case is for a survey123 field application which will require offline access to a .tpk
There are many possible 1/2 degree tpks with high resolution imagery. The user will need to download the tile they need and copy to the appropriate directory on their device. When I try to follow the directions here Prepare basemaps for offline use—Survey123 for ArcGIS | ArcGIS under the "Copy your tile package directly to your device" heading, no luck.
Like others, when I modify the .info JSON it continues to be overwritten when republished. I see some others have gotten closer by linking to a tile layer, but that will not support my use case.
Any help is much appreciated.
Kind regards