Hi HollyOPK,
There is a fix in the master branch for this in GitHub:
https://github.com/EpicGames/UnrealEngine/commit/76de37fc6fce97588080a7a01e89e7d7deb208b3
But, a 2.2 gig OBB is fairly large. You may want to look into reducing the size anyway. Take a look at this tutorial on reducing size (applies to OBB as well as just APK):
https://docs.unrealengine.com/latest/INT/Platforms/Android/ReducingAPKSize/index.html