Update
With this release, zio-config stopped considering comma separated values as list, and made it configurable.
Implementation detail
zio-config depends on ZIO's Flat even to handle indexed format with the recent changes and ZIO's Flat always consider list as comma separated. This resulted in reintroducing certain issues where values with comma were considered as list in HOCON, YML etc.
This behaviour is now made configurable within zio-config, with default behaviour as not having any such assumptions.