We encountered a similar issue in our project using Unity version 2022.3.10f1, and upgrading to Unity 2022.3.61f1 resolved it. I'm not sure if you're dealing with the exact same problem, but in our case, it appeared to be a bug in earlier 2022.3.x versions that was fixed in a later release.

Just a note: in the Play Asset Delivery system, install-time assets are included with the initial app download, while on-demand assets must be explicitly requested at runtime. Unity does not automatically download on-demand assets, even if install-time assets depend on them. If there's a dependency, you need to make sure those on-demand packs are requested and downloaded before use.

P.S. After upgrading Unity, we found we no longer needed the PAD pack at all.

Good luck!