resume_stream attribute of BinLogStreamReader not working as documented

According to documentation, BinLogStreamReader starts from a given position if an specific position of the binlog file is assigned to log_pos and resume_stream = True.
Nevertheless:
- when resume_stream = true, whatever value I assigned to log_pos, no past events are retrieved in the steam.
- when resume_tream = false, stream retrieves events since log_pos
It seems the behaviour is different as the documented.
Could you clarify it, please?
Thanks in advance.

Start by reading the BinLogStreamReader documentation and its handling of resume_stream and log_pos. Reproduce the two reported settings, then compare the documented and actual stream positions; done means the behavior and documentation agree.

Written by the indexing model from the issue text.