We've been developing with a stack composed of zio, interop-cats, cats-effect, fs2 and fs2-kafka for a while.

Recently we've tried upgrading to RC21, but our applications started to consume more memory and eventually crashed due to an OOM.

Me and @sebver worked on a reproduction case which can be found here: github.com/Fristi/zio-memory-issue/

The program runs fine for about 10 minutes and after that it crashes with an OOM, while RC20 seems to be working fine

I'll be off for holidays next week and @sebver will come back to follow up on this if needed!