FoConrad commented on issue #10563: Suboptimal  performance implementing PPO 
with Adam Optimizer
URL: 
https://github.com/apache/incubator-mxnet/issues/10563#issuecomment-425615751
 
 
   The way I debugged the implementation is similar to the code I posted above. 
I ran the OpenAI baselines code with my implementation of PPO, made sure they 
were initialized the same, and stepped through comparing the weights and 
gradients.
   
   I found immediately my value function was incorrect.
   
   Also, double check your initialization to begin with. Sometimes PPO was very 
sensitive to the weight initialisation.
   
   Hope this helps!

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