DurableObject alarm creation fails with: The RPC receiver does not implement the method "xyz"

I am calling a custom method on my Durable Object class, but receiving the message The RPC receiver does not implement the method "xyz". This started failing recently.

Any advice is appreciated but current things of note / suspicions are:
  • The DO class extends an abstract base class. The method in the error message lives on the abstract base class.
  • We started wrapping our Durable Object exports with Sentry.instrumentDurableObjectWithSentry from @sentry/cloudflare
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