Oodle Network Compression High Compression Fail rate

Hi there and thank you in advance for any useful support.
I have a multiplayer game and have enabled Oodle Network compression for client/server comms. I see a very high rate of OodleCompressFailNums in the stat OodleNetwork console output. I’m curious if anyone has any tips on troubleshooting this.

I did same tracing with the debugger and see a lot of packets where the compressed packet is the same size as the uncompressed packet. Is my packet capture sampling not diverse enough? I ran through more than a gig of captured network traffic to train the dictionary. I’m not getting the compression results that I expect.

Any help here would be greatly appreciated.