It seems that Deferred Deep links cause Silk browser to crash on Fire TV. Even the demo link provided at https://developer.amazon.com/docs/fire-tv/deep-linking-featured-content.html#encode_your_deep_link causes the issue:
Fire OS 184.108.40.206 (NS6281/3387).
Fire TV Home Version 6321000.1
Silk version 220.127.116.1196.162.30
Is it a known bug?