BUG: EventBridge Pipes duplicates events from SQS to Lambda when a Target Input Transformer is specified

Question

I think I found a bug with EventBridge when the source is a FIFO SQS and the target is Lambda (Most likley not limited to that pair).
I'm using a FIFO queue with batch size of 10 and when I use a tansformation template, the lambda recieves a batch of 10 events BUT they're all for the same event.... I don't get this behavior when I don't use a transformation template.... Each event in the array sent to lambda is unique.

Answer

I opened up a support ticket with AWS and they're able to replicate it. One key thing I didn't mention in my original post is I'm using event bridge rules to send messages/events to the SQS queue. And it doesn't need to be a FIFO queue, having the same problem with a standard queue.

Answer

AWS fixed the bug about a week ago. The sad thing is they spent more time refusing to admit the existance of this bug than they did actually fixing it. It took them about 1 week to fix and deploy and 3 weeks of back and forth of them claiming I was doing something wrong.... I pray no one else has to go through that experience with their support staff!!!

BUG: EventBridge Pipes duplicates events from SQS to Lambda when a Target Input Transformer is specified

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