Cantina battle 8-G doesn't give Zeta rewards

I have only received 1 zeta from it out of all the energy I have used on it. But it does give them out eventually. 

The Zetas and Omis in Cantina have a stupid low drop rate. I run all my energy on 9-f and maybe have had 1 Omi drop and before that when we just had 8 tiers I think over many years I had maybe 5 omis drop

It’s a very low drop rate.  Since the update I’ve received 10 Omega and 3 Zeta farming flawed signal data from this node.  Pretty happy with that drop rate for me.  It seems significantly improved from what it was.