Partial Root Access on Pixel 9a: Issues with Writing and Deleting Files

I have been using Magisk since version 23 on my Samsung stock-rom and LineageOS on my Nexus/Pixel devices, and it has always worked flawlessly. However, when I tried to root my Pixel 9a using the 'init_boot.img' patching method, I encountered some unexpected issues.

The partial root access was achieved, and the apps that require root access are functioning correctly. However, I am facing difficulties with writing and deleting files from the following directories:

* /system/app/
* /system/priv-app/
* /product/app/

The root file managers are showing these directories as mounted as RW (read-write), but I am unable to write or delete files from them. Additionally, I am also unable to write or delete files using the 'adb shell su' command.

I have tried various ROMs, including Google's stock ROM, CalyxOS, GrapheneOS, and I am still waiting for the LineageOS ROM to be published. I would appreciate any help or direction that can be provided to resolve this issue.