- Fixed reduction using `self.log(sync_dict=True, reduce_fx={mean,max})` ([9142](https://github.com/PyTorchLightning/pytorch-lightning/pull/9142))
- Fixed not setting a default value for `max_epochs` if `max_time` was specified on the `Trainer` constructor ([9072](https://github.com/PyTorchLightning/pytorch-lightning/pull/9072))
- Fixed the CometLogger, no longer modifies the metrics in place. Instead creates a copy of metrics before performing any operations ([9150](https://github.com/PyTorchLightning/pytorch-lightning/pull/9150))
- Fixed `DDP` "CUDA error: initialization error" due to a `copy` instead of `deepcopy` on `ResultCollection` ([9239](https://github.com/PyTorchLightning/pytorch-lightning/pull/9239))
Contributors
ananthsub bamblebam carmocca daniellepintz ethanwharris kaushikb11 sohamtiwari3120 tchaton
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