GooglePAD ondemand assetpack file packaged redundantly in obb file

In order to distribute content within GooglePAD's distribution size limit.
(1GB for install-time, 500MB for fast-follow, and 500MB for on-demand)
we are trying to package it as assetpack by dividing it into chunks(.pak files)
Currently, pak files are being packaged redundantly in the obb file.
So we cannot upload aab to google play due to exceeded size limit.

1. Create third person template project using 4.26
2. unzip attached TPS426.zip file and overwrite to the template project 
3. file > package project > android > ETC2
4. unzip output obb file and aab file in "[project path]\Binaries\Android"
5. check if pakchunk1000-Android_ETC2.pak is exist in obb file

expected : pakchunk1000-Android_ETC2.pak should not be exist in obb file

if packaging is failed with following error message..

PackagingResults: Error: cmd.exe failed with args /c "D:\UnrealProjects\TPS426\Intermediate\Android\armv7\gradle\rungradle.bat" :app:assembleDebug

1. make sure Android SDK (29), NDK(21b) , Java, .NET and Android Studio are installed properly
2. run Android Studio v 4.x.x (or 4.1.2) - Note that you need to use higher version than version 3.5.3 that officially announced in 4.26 release note 
3. open "[project path]\Intermediate\Android\gradle\"
4. in Android Studio, build > rebuild project
5. go back to unreal editor and retry package project again

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