Caused by java.lang.NullPointerException Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference com.amazonaws.mobileconnectors.appsync.WebSocketConnectionManager.releaseSubscription

[AbdallahMustafaQasem]

Describe the bug
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To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Screenshots
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Environment(please complete the following information):

• AppSync SDK Version: [e.g. 2.6.25]

Device Information (please complete the following information):

• Device: [e.g. Pixel XL, Simulator]
• Android Version: [e.g. Nougat 7.1.2]
• Specific to simulators:

Additional context
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[gpanshu]

Duplicate of #346