- Environment subprocesses now close immediately on timeout or wrong API version. (#3679)
- Fixed an issue in the gym wrapper that would raise an exception if an Agent called EndEpisode multiple times in the same step. (#3700)
- Fixed an issue where exceptions from environments provided a returncode of 0. (#3680)
- Fixed an issue where logging output was not visible; logging levels are now set consistently (#3703).
## [0.15.0-preview] - 2020-03-18
### Major Changes