Steps to reproduce

In line 282 of picklepersistence.py:
[BUG] if self.user_data or self.chat_data or self.conversations:
[FIX] if self.user_data or self.chat_data or self.conversations or self.bot_data:

Add self.bot_data in the if-check
3.

Expected behaviour

When you register the pickle persistence with (store_user_data=False, store_chat_data=False), the bot should save bot_data to pickle file every time it calls flush().

Actual behaviour

In the current version, the bot only checks user_data/chat_data/conversation to be non-empty to save the pickle file, which when the case (store_user_data=False, store_chat_data=False), the bot never checks bot_data in order to save the pickle file. In my case, user_data/chat_data are always empty, so bot doesn't save to pickle file

Configuration

Operating System:

Version of Python, python-telegram-bot & dependencies:

$ python -m telegram

Logs

Insert logs here (if necessary)