FYI: We just found out that consuming from UMH via Websocket's is a bad idea:
https://github.com/redpanda-data/benthos/issues/124
The websocket server really can't be trusted in delivering events, it actually drops an insane amount of data and never delivers it on clients, even in low volumes.
That does leave the question open what the best way is to actually subscribe to UMH is...