Improvements
============
- [\6044](https://github.com/rasahq/rasa/issues/6044): Do not deepcopy slots when instantiating trackers. This leads to a significant
speedup when training on domains with a large number of slots.
- [\6226](https://github.com/rasahq/rasa/issues/6226): Added more debugging logs to the lock-stores to simplify debugging in case of
connection problems.
Added a new parameter `socket_timeout` to the `RedisLockStore`. If Redis doesn't
answer within `socket_timeout` seconds to requests from Rasa Open Source, an error
is raised. This avoids seemingly infinitely blocking connections and exposes connection
problems early.
Bugfixes
========
- [\5182](https://github.com/rasahq/rasa/issues/5182): Fixed a bug where domain fields such as `store_entities_as_slots` were overridden
with defaults and therefore ignored.
- [\6191](https://github.com/rasahq/rasa/issues/6191): If two entities are separated by a comma (or any other symbol), extract them as two separate entities.
- [\6340](https://github.com/rasahq/rasa/issues/6340): If two entities are separated by a single space and uses BILOU tagging,
extract them as two separate entities based on their BILOU tags.