NodeJS : Randomly getting 502 Bad Gateway response from AWS API Gateway after changing Lambda runtim

NodeJS : Randomly getting 502 Bad Gateway response from AWS API Gateway after changing Lambda runtime from Node 8.x to Node 12.x
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NodeJS : Randomly getting 502 Bad Gateway response from AWS API Gateway after changing Lambda runtime from Node 8.x to Node 12.x
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8.x 502 from response after from AWS NodeJS API 12.x getting Gateway Bad runtime changing Node : Lambda Gateway Node to Randomly