[Bug]: Episode start flag is never set for off policy algorithms

[josndan]

🐛 Bug

In _sample_action of OffPolicyAlgorithm class, self.predict function is called. But episode_start flag is never set for any off policy algorithms.

To Reproduce

No response

Relevant log output / Error message

No response

System Info

No response

Checklist

• [X] My issue does not relate to a custom gym environment. (Use the custom gym env template instead)
• [X] I have checked that there is no similar issue in the repo
• [X] I have read the documentation
• [X] I have provided a minimal and working example to reproduce the bug
• [X] I've used the markdown code blocks for both code and stack traces.

[araffin]

Hello, that's correct because there is current only RecurrentPPO that make use of states (LSTM states) and episode starts (to reset the states).