Hi @Ryan Goree
Welcome to Microsoft Q&A! Thanks for posting the question.
Can you confirm if you are observing this error intermittently? Are you connecting to azure Redis cache or Redis cache on VM? What happens when you connect your Redis server using any of the Redis clients. Have you observed the same issue?
I have tested the scenario at my end and couldn't observe the same issue. Please confirm if you have specified the REDISCACHEKEY and REDISCACHEHOSTNAME as environment variables i.e. in your application setting on portal or local.setting.json if you are executing it on your local machine.