mev flood transactions don't always go through and the coinbase addresses' balance doesn't go up

We use mev-flood here - https://github.com/kurtosis-tech/eth2-package/blob/main/src/mev_flood/mev_flood_launcher.star

We run it using the coinbase address as admin key and another address as the user key, the coinbase address doesn't go up deterministically. Is there a way to use flood in order to send transactions that increase the coinbase address' balance at a cadence?