Unexpected SQS Messages

First off, my serverless.yml: https://gist.github.com/davidfells/15169c9afda25b02de4bb386d77b814a

In CloudWatch, all of my SQS queues show they are receiving ~15 empty receives every few seconds. As you can imagine this is racking up usage pretty rapidly. I have no idea where the messages are coming from. No other applications touch this stack.

I’ve confirmed that all the Lambdas have the right triggers and that they aren’t running excessively. In fact, my scheduled Lambda doesn’t run at all unless I manually invoke it. Dead letter queues aren’t creating either, which is odd.

Latest version of serverless and all plugins, no errors in my output, the only warnings that appear are expected and related to the iam policies plugin.