Key Rotation Support for Offline Downloader

We are working with ExoPlayer Downloader (com.google.android.exoplayer2) and want to test with a manifest having multiple keys i.e. the content is having key rotation.

After reading from different forums, we added "setMultiSession(true)" during creation of "OfflineLicenseHelper" used for download.

We tried
val offlineLicenseHelper = OfflineLicenseHelper( DefaultDrmSessionManager.Builder() .setKeyRequestParameters(drmConfiguration.requestHeaders) .setMultiSession(true) .build(httpMediaDrmCallback), DrmSessionEventListener.EventDispatcher() )

Also during creation of MediaItem, we have used "mediaItemBuilder.setDrmMultiSession(true)"

Result :
I am not sure if multiple keys are getting downloaded or not.
Because when I try to play the downloaded content, it plays till the duration of 1st key. When it encounters segments from 2nd key we get "Caused by: android.media.MediaCodec$CryptoException: Crypto key not available" error.

Please help.