App crashing when minifyEnabled = true, and adding the new MADA card.

[arslanbhutta]

Everything is working in the DEBUG version of the app, i.e when minifyEnabled = false.
But when we generate the release build for google play store and set minifyEnabled = true in build.gradle file then adding a new card is working fine except for the MADA card. 
When we try to add mada card then following exception occurs:

Exception:

Fatal Exception: java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.payfort.fortpaymentsdk.domain.model.SdkResponse)
       at android.os.Parcel.writeSerializable(Parcel.java:2181)
       at android.os.Parcel.writeValue(Parcel.java:1947)
       at android.os.Parcel.writeArrayMapInternal(Parcel.java:1039)
       at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1620)
       at android.os.Bundle.writeToParcel(Bundle.java:1304)
       at android.os.Parcel.writeBundle(Parcel.java:1108)
       at android.content.Intent.writeToParcel(Intent.java:11143)
       at android.app.IActivityClientController$Stub$Proxy.finishActivity(IActivityClientController.java:1490)
       at android.app.ActivityClient.finishActivity(ActivityClient.java:153)
       at android.app.Activity.finish(Activity.java:6539)
       at android.app.Activity.finish(Activity.java:6573)
       at com.payfort.fortpaymentsdk.presentation.init.InitSecureConnectionActivity.finish(InitSecureConnectionActivity.kt:112)
       at com.payfort.fortpaymentsdk.presentation.init.InitSecureConnectionActivity$setupLocalBroadCastConfigs$1.onReceive(InitSecureConnectionActivity.kt:94)
       at androidx.localbroadcastmanager.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:313)
       at androidx.localbroadcastmanager.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:121)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loopOnce(Looper.java:233)
       at android.os.Looper.loop(Looper.java:344)
       at android.app.ActivityThread.main(ActivityThread.java:8191)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:584)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1034)

As per my findings, com.payfort.fortpaymentsdk.domain.model.SdkResponse is a Serializable class. it has the following attribute.private Map<String, Object> responseMap;Object must be Serializable. But We try to add a MADA card then it returns the exception.
Please guide me to resolve this issue as we are unable to upload the app on play store with this issue.